Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220106
C. Tagad, S. Sabharwal, R. Aiyer
ATP conferred protection of silver nanoparticles (AgNPs) against salt induced aggregation has been used as a simple, sensitive and cost effective tool for detection of acid phosphatase (ACP) activity. In the absence of the enzymes, unreacted ATP protects AgNPs from salt-induced aggregation. Dephosphorylation of ATP in the presence of the enzyme reduces the protecting action of ATP and thus there is aggregation of AgNPs. Developed sensing tool for the detection of ACP were found to be suitable in the range of 0.6 to 7 units per ml.
{"title":"Detection of acid phosphatase activity using ATP conferred protection of AgNPs against salt induced aggregation","authors":"C. Tagad, S. Sabharwal, R. Aiyer","doi":"10.1109/ISPTS.2015.7220106","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220106","url":null,"abstract":"ATP conferred protection of silver nanoparticles (AgNPs) against salt induced aggregation has been used as a simple, sensitive and cost effective tool for detection of acid phosphatase (ACP) activity. In the absence of the enzymes, unreacted ATP protects AgNPs from salt-induced aggregation. Dephosphorylation of ATP in the presence of the enzyme reduces the protecting action of ATP and thus there is aggregation of AgNPs. Developed sensing tool for the detection of ACP were found to be suitable in the range of 0.6 to 7 units per ml.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"26 1","pages":"173-176"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76097542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220083
Sudha J. Kulkarni, S. Tembe, M. Karve
The present study describes construction of amperometric biosensor for determination of inorganic phosphate (IP) using single enzyme acid phosphatase (ACP). A blend of biopolymers agarose and guar gum was used to immobilize ACP and estimation of inorganic phosphate was carried out electrochemically using substrate L-ascorbic acid-2-phosphate. Enzyme catalyzes substrate hydrolysis and ascorbic acid is formed as a product which shows oxidation peak at +0.08 V. This peak intensity decreases when enzyme electrode is dipped in inorganic phosphate solution prior to monitoring substrate hydrolysis. The response is linear in the range of 1 × 10-6 M to 4 × 10-5 M IP with a detection limit of 5 × 10-7 M. The enzyme sensor was stable over a period of three months with a marginal loss in enzyme activity when stored at 4° C under dry conditions. This single enzyme approach tries to overcome the drawbacks of multi-enzyme system for inorganic phosphate determination yet maintaining sensitivity and selectivity of enzymatic methods. Possible influence of other species coexisting with inorganic phosphate in water samples was investigated. The performance of this single enzyme based biosensor was in good agreement with earlier reports on biosensors for inorganic phosphate determination using multi-enzyme approach.
本研究利用单酶酸性磷酸酶(ACP)构建了测定无机磷酸盐(IP)的安培生物传感器。采用生物聚合物琼脂糖和瓜尔胶的混合物固定ACP，用底物l -抗坏血酸-2-磷酸电化学测定无机磷酸盐。酶催化底物水解，产物为抗坏血酸，在+0.08 V处出现氧化峰。当酶电极在监测底物水解之前浸入无机磷酸盐溶液时，该峰强度降低。在1 × 10-6 M ~ 4 × 10-5 M IP范围内，响应呈线性，检测限为5 × 10-7 M。在4°C干燥条件下，酶传感器在3个月的时间内保持稳定，酶活性略有下降。这种单酶法克服了多酶法测定无机磷酸盐的缺点，同时保持了酶法测定无机磷酸盐的灵敏度和选择性。考察了与无机磷酸盐共存的其他物种对水样的影响。这种基于单酶的生物传感器的性能与先前使用多酶法测定无机磷酸盐的生物传感器的报道很好地一致。
{"title":"Development of acid phosphate inhibition-based amperometric biosensor for determination of inorganic phosphate","authors":"Sudha J. Kulkarni, S. Tembe, M. Karve","doi":"10.1109/ISPTS.2015.7220083","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220083","url":null,"abstract":"The present study describes construction of amperometric biosensor for determination of inorganic phosphate (IP) using single enzyme acid phosphatase (ACP). A blend of biopolymers agarose and guar gum was used to immobilize ACP and estimation of inorganic phosphate was carried out electrochemically using substrate L-ascorbic acid-2-phosphate. Enzyme catalyzes substrate hydrolysis and ascorbic acid is formed as a product which shows oxidation peak at +0.08 V. This peak intensity decreases when enzyme electrode is dipped in inorganic phosphate solution prior to monitoring substrate hydrolysis. The response is linear in the range of 1 × 10-6 M to 4 × 10-5 M IP with a detection limit of 5 × 10-7 M. The enzyme sensor was stable over a period of three months with a marginal loss in enzyme activity when stored at 4° C under dry conditions. This single enzyme approach tries to overcome the drawbacks of multi-enzyme system for inorganic phosphate determination yet maintaining sensitivity and selectivity of enzymatic methods. Possible influence of other species coexisting with inorganic phosphate in water samples was investigated. The performance of this single enzyme based biosensor was in good agreement with earlier reports on biosensors for inorganic phosphate determination using multi-enzyme approach.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"141 1","pages":"63-66"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86148600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220110
M. Singha, J. Nagaraju
This paper presents the design, simulation and fabrication of dielectrophoretic chip with integrated nickel 3D electrodes for bioparticle separation. Finite element analysis software COMSOL Multyphysics 4.3 is used to measure the electric field distribution and also the temperature profile inside the microfluidic channel. The temperature rise is found to be 0.5 K. Electric field distribution shows almost uniform electric field on XY plane at different Z axis. Fabrication of 3D nickel electrode is accomplished using electroplating process. 3D sidewall dielectrophoretic chip reduces the electrochemical effect and joule heating effect.
{"title":"Design simulation and fabrication of 3D electrode for dielectrophoretic chip","authors":"M. Singha, J. Nagaraju","doi":"10.1109/ISPTS.2015.7220110","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220110","url":null,"abstract":"This paper presents the design, simulation and fabrication of dielectrophoretic chip with integrated nickel 3D electrodes for bioparticle separation. Finite element analysis software COMSOL Multyphysics 4.3 is used to measure the electric field distribution and also the temperature profile inside the microfluidic channel. The temperature rise is found to be 0.5 K. Electric field distribution shows almost uniform electric field on XY plane at different Z axis. Fabrication of 3D nickel electrode is accomplished using electroplating process. 3D sidewall dielectrophoretic chip reduces the electrochemical effect and joule heating effect.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"3 1","pages":"192-195"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74198583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220101
R. Godbole, V. Godbole, P. Rao, P. Alegaokar, S. Bhagwat
Highly porous zinc ferrite (ZnFe2O4) nano-size powders are synthesized by varying fuel to oxidizer ratio. The metal nitrates are used as oxidizers while glycine is used as a fuel. The synthesis of material is carried out using an auto-combustion method. It is observed that the enhancement of magnetization occur with the enhancement of `Fuel to Oxidizer' ratio i.e. Glycine to metal Nitrate (G/N) ratio. The structural, morphological, and magnetic features of samples are studied using XRD, SEM, EDAX, BET and VSM techniques. At the microscopic level, the materials exhibit a formation of spongelike structure containing nano-size particles. The XRD measurements confirm the formation of single phase spinel structure of zinc ferrite (ZnFe2O4). As a case study, the response of materials to ethanol gas is studied. It is observed that higher G/N ratio lead to lowering of gas sensitivity as well as operating temperature. The results are discussed in terms of reactions of surface oxygen with ethanol gas.
{"title":"Influence of fuel to oxidizer ratio on gas sensing characteristics of ZnFe2O4 nanoparticles","authors":"R. Godbole, V. Godbole, P. Rao, P. Alegaokar, S. Bhagwat","doi":"10.1109/ISPTS.2015.7220101","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220101","url":null,"abstract":"Highly porous zinc ferrite (ZnFe2O4) nano-size powders are synthesized by varying fuel to oxidizer ratio. The metal nitrates are used as oxidizers while glycine is used as a fuel. The synthesis of material is carried out using an auto-combustion method. It is observed that the enhancement of magnetization occur with the enhancement of `Fuel to Oxidizer' ratio i.e. Glycine to metal Nitrate (G/N) ratio. The structural, morphological, and magnetic features of samples are studied using XRD, SEM, EDAX, BET and VSM techniques. At the microscopic level, the materials exhibit a formation of spongelike structure containing nano-size particles. The XRD measurements confirm the formation of single phase spinel structure of zinc ferrite (ZnFe2O4). As a case study, the response of materials to ethanol gas is studied. It is observed that higher G/N ratio lead to lowering of gas sensitivity as well as operating temperature. The results are discussed in terms of reactions of surface oxygen with ethanol gas.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"59 1","pages":"147-153"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83691143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220071
Bharat G. Baraskar, S. P. Kharat, S. G. Kakade, R. Kambale, Y. D. Kolekar, S. Wada
The ferroelectric and piezoelectric properties of Sn4+ modified (Ba0.7Ca0.3)(Ti1-xSnx)O3, (with x = 0.000 to 0.100 in steps of 0.025) lead free electroceramics were investigated. With Sn4+ substitution, a structural phase transition from pure tetragonal to pseudo-cubic structure has been observed; which strongly influence the ferroelectric/ piezoelectric nature of the samples. At room temperature, all the samples exhibit typical polarization-electric field hysteresis as well as field induced strain butterfly loop which confirms the ferroelectric and piezoelectric nature. As Sn4+ content increases, the ferroelectric properties seems to be suppressed while the piezoelectric properties gets improved up to x = 0.075 and then decreased. Moderately high remanent polarization (Pr) and low coercive field (Ec) were observed for all compositions, which may be essential for storage and switching applications.
{"title":"Ferroelectric and piezoelectric properties of (Ba0.7Ca0.3)(Ti1−xSnx)O3 lead-free ceramics","authors":"Bharat G. Baraskar, S. P. Kharat, S. G. Kakade, R. Kambale, Y. D. Kolekar, S. Wada","doi":"10.1109/ISPTS.2015.7220071","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220071","url":null,"abstract":"The ferroelectric and piezoelectric properties of Sn<sup>4+</sup> modified (Ba<sub>0.7</sub>Ca<sub>0.3</sub>)(Ti<sub>1-x</sub>Sn<sub>x</sub>)O<sub>3</sub>, (with x = 0.000 to 0.100 in steps of 0.025) lead free electroceramics were investigated. With Sn<sup>4+</sup> substitution, a structural phase transition from pure tetragonal to pseudo-cubic structure has been observed; which strongly influence the ferroelectric/ piezoelectric nature of the samples. At room temperature, all the samples exhibit typical polarization-electric field hysteresis as well as field induced strain butterfly loop which confirms the ferroelectric and piezoelectric nature. As Sn<sup>4+</sup> content increases, the ferroelectric properties seems to be suppressed while the piezoelectric properties gets improved up to x = 0.075 and then decreased. Moderately high remanent polarization (P<sub>r</sub>) and low coercive field (E<sub>c</sub>) were observed for all compositions, which may be essential for storage and switching applications.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"96 1","pages":"11-14"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85780398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220078
Rohan Dhale, Vipul Dhongade, R. Aiyer, K. Kodam
The paper reports the development of low cost, portable and easily operable optical fiber based carbon dioxide biosensor (CO2). The chlorophyll and anthocyanin is used as active clads. Coriander and red leaf amaranth (amaranth) contain photosynthetic pigments viz. chlorophyll and anthocyanin. Developed sensors selectively show CO2 gas concentration dependent response from 1 to 500 ppm that is measured in terms of transmitted intensity through a plastic optical fiber. It is found that chlorophyll shows better response in terms of Sensitivity 1.571%/ppm than anthocyanin 0.667%./ppm. Thickness (Four layers) and clad length (7 mm) optimization is done for better sensitivity. Sensors show negligible response to humidity and methane gas. The sensor can be used when stored at room temperature (250C) up to a maximum of 25 days giving 85 to 90% retention of the response.
{"title":"Development of optical fiber based chlorophyll and anthocyanin coated carbon dioxide biosensor","authors":"Rohan Dhale, Vipul Dhongade, R. Aiyer, K. Kodam","doi":"10.1109/ISPTS.2015.7220078","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220078","url":null,"abstract":"The paper reports the development of low cost, portable and easily operable optical fiber based carbon dioxide biosensor (CO2). The chlorophyll and anthocyanin is used as active clads. Coriander and red leaf amaranth (amaranth) contain photosynthetic pigments viz. chlorophyll and anthocyanin. Developed sensors selectively show CO2 gas concentration dependent response from 1 to 500 ppm that is measured in terms of transmitted intensity through a plastic optical fiber. It is found that chlorophyll shows better response in terms of Sensitivity 1.571%/ppm than anthocyanin 0.667%./ppm. Thickness (Four layers) and clad length (7 mm) optimization is done for better sensitivity. Sensors show negligible response to humidity and methane gas. The sensor can be used when stored at room temperature (250C) up to a maximum of 25 days giving 85 to 90% retention of the response.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"43 1","pages":"39-42"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81035599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220121
S. Vanalakar, S. Vhanalakar, V. Patil, N. Harale, B. Kale, P. Patil, J. H. Kim
Zinc oxide (ZnO) nanorod arrays were deposited on to the soda-lime glass substrates by wet chemical route using zinc acetate as precursor. The structural and surface morphological properties of the ZnO nanorod arrays (ZNAs) were investigated by X-ray diffraction (XRD), and scanning electron microscopy (SEM) respectively. The XRD pattern revealed wurtzite crystal structures of ZNAs, preferentially orienting in the (002) direction. Depending on the length of nanorod, the intensity of the (002) plane was found to be varied. SEM micrographs show the vertical alignment of ZNAs perpendicular to the substrate and increase in rod length with increase in deposition time. The Gas sensing device was prepared by using ZNAs and tested for NO2 gas at different temperatures, concentrations and size of nanorods. Response increased with gas concentration as well as temperature. It was revealed that ZNAs gas sensor operating at 150 0C temperature could detect NO2 at low concentration (100ppm) with very high sensitivity (90 %).
{"title":"Synthesis and characterization of chemically deposited ZnO nanorods for NO2 gas sensing applications","authors":"S. Vanalakar, S. Vhanalakar, V. Patil, N. Harale, B. Kale, P. Patil, J. H. Kim","doi":"10.1109/ISPTS.2015.7220121","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220121","url":null,"abstract":"Zinc oxide (ZnO) nanorod arrays were deposited on to the soda-lime glass substrates by wet chemical route using zinc acetate as precursor. The structural and surface morphological properties of the ZnO nanorod arrays (ZNAs) were investigated by X-ray diffraction (XRD), and scanning electron microscopy (SEM) respectively. The XRD pattern revealed wurtzite crystal structures of ZNAs, preferentially orienting in the (002) direction. Depending on the length of nanorod, the intensity of the (002) plane was found to be varied. SEM micrographs show the vertical alignment of ZNAs perpendicular to the substrate and increase in rod length with increase in deposition time. The Gas sensing device was prepared by using ZNAs and tested for NO2 gas at different temperatures, concentrations and size of nanorods. Response increased with gas concentration as well as temperature. It was revealed that ZNAs gas sensor operating at 150 0C temperature could detect NO2 at low concentration (100ppm) with very high sensitivity (90 %).","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"50 1","pages":"245-248"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85999337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220097
S. Patil, A. Shaligram
This paper reports a novel retro reflective fiber optic surface roughness sensor. The sensor probe consists of three parallel fibers and one inclined at an angle of 50. The reflector is placed at optimized distance in order to get maximum sensitivity for surface roughness measurement. Mathematical modeling of this fiber optic displacement sensor is reported based on ray tracing method. MS surfaces are sprayed with aluminum to get different surface roughness values which are measured on the standard instrument. Experiments are performed for measuring surface roughness values for these surfaces. Experimental results show good agreement with simulation results. These results are also compared and validated with standard instrument used to measure the surface roughness.
{"title":"Design, development and experimental study of novel configuration of retro reflective fiber optic sensor for measuring of surface roughness","authors":"S. Patil, A. Shaligram","doi":"10.1109/ISPTS.2015.7220097","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220097","url":null,"abstract":"This paper reports a novel retro reflective fiber optic surface roughness sensor. The sensor probe consists of three parallel fibers and one inclined at an angle of 50. The reflector is placed at optimized distance in order to get maximum sensitivity for surface roughness measurement. Mathematical modeling of this fiber optic displacement sensor is reported based on ray tracing method. MS surfaces are sprayed with aluminum to get different surface roughness values which are measured on the standard instrument. Experiments are performed for measuring surface roughness values for these surfaces. Experimental results show good agreement with simulation results. These results are also compared and validated with standard instrument used to measure the surface roughness.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"18 1","pages":"129-132"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88018855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220075
K. G. Girija, Damanjeet Kaur, Vinod Belwanshi, Jyoti Mehta, R. Vatsa, A. Topkar
Micro Hotplates are extensively used in chemical sensor, flow sensor and other micro systems. In this paper, we have presented the design, modeling and simulation results of serpentine, spiral and fan shape micro heaters based on standard Multi User MEMS Process for fabrication in a multi product wafer run. The heater structure was optimized to get good temperature homogeneity, low power consumption and better thermal isolation. Considering the power consumption and temperature homogeneity, spiral type heater with non-uniform width was observed to be the best choice among the three types of heater geometries.
{"title":"Design and electro-thermal analysis of micro hotplates for chemical sensors using standard multi user MEMS process","authors":"K. G. Girija, Damanjeet Kaur, Vinod Belwanshi, Jyoti Mehta, R. Vatsa, A. Topkar","doi":"10.1109/ISPTS.2015.7220075","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220075","url":null,"abstract":"Micro Hotplates are extensively used in chemical sensor, flow sensor and other micro systems. In this paper, we have presented the design, modeling and simulation results of serpentine, spiral and fan shape micro heaters based on standard Multi User MEMS Process for fabrication in a multi product wafer run. The heater structure was optimized to get good temperature homogeneity, low power consumption and better thermal isolation. Considering the power consumption and temperature homogeneity, spiral type heater with non-uniform width was observed to be the best choice among the three types of heater geometries.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"29 1","pages":"27-29"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73726746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220119
Mahantesh P. Mattada, Sachin Magadum, H. Guhilot
Fully digital time-domain temperature sensors are designed and placed at five different positions within FPGA. Five tiny pulse-generators are used as five temperature sensors. Using manual floor-planning four sensors are placed at four different corners and one at centre. Single 9-bit Time to Digital Converter is utilized for digital output coding. Vernier Time to Digital Converter with 6 picoseconds resolution is presented here. The overall design utilizes 184 logical elements of FPGA i.e. less than 1.5% of the total resources. Implemented temperature sensors give nearly 0.5°C resolution and maximum of ±1.5 LSB nonlinearity is observed over the range.
{"title":"Identification of hotspots on FPGA using Time to Digital Converter and distributed tiny sensors","authors":"Mahantesh P. Mattada, Sachin Magadum, H. Guhilot","doi":"10.1109/ISPTS.2015.7220119","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220119","url":null,"abstract":"Fully digital time-domain temperature sensors are designed and placed at five different positions within FPGA. Five tiny pulse-generators are used as five temperature sensors. Using manual floor-planning four sensors are placed at four different corners and one at centre. Single 9-bit Time to Digital Converter is utilized for digital output coding. Vernier Time to Digital Converter with 6 picoseconds resolution is presented here. The overall design utilizes 184 logical elements of FPGA i.e. less than 1.5% of the total resources. Implemented temperature sensors give nearly 0.5°C resolution and maximum of ±1.5 LSB nonlinearity is observed over the range.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"305 1","pages":"235-239"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75666144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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