{"title":"High-performance analogue measurement using internal enhanced PWM and ADC of a DSP-chip","authors":"O. Martens, M. Min, H. Trampark, A. Liimets","doi":"10.1109/WISP.2007.4447593","DOIUrl":null,"url":null,"abstract":"Modern control-oriented and general-purpose low- cost digital signal processor (DSP) chips include multiple 16-bit pulse-width modulators (PWM), in some cases with enhanced 8- bit part with possibility to adjust the PWM in fractions of the digital clock (\"micro-steps\"). Such PWM work at clock frequencies of 100 MHz and higher and can be used as a precise digital-to-analog converters (DAC). Such DSP chips also include multichannel (multiplexed) analog-to-digital converter ADC, of up to 12-bits resolution, working at conversion rate of up to 10 MHz. So, combining these resources together, with few extra components, high-performance analog-to-digital conversion is possible. In the current paper possibility of achieving of up to 20-bit resolution and measurement of frequencies of frequencies to tens of kHz or even more - is proposed, investigated and discussed. A PWM is used as the DAC in the compensation feedback path of the total analog-to-digital conversion path.","PeriodicalId":164902,"journal":{"name":"2007 IEEE International Symposium on Intelligent Signal Processing","volume":"100 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2007 IEEE International Symposium on Intelligent Signal Processing","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/WISP.2007.4447593","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Modern control-oriented and general-purpose low- cost digital signal processor (DSP) chips include multiple 16-bit pulse-width modulators (PWM), in some cases with enhanced 8- bit part with possibility to adjust the PWM in fractions of the digital clock ("micro-steps"). Such PWM work at clock frequencies of 100 MHz and higher and can be used as a precise digital-to-analog converters (DAC). Such DSP chips also include multichannel (multiplexed) analog-to-digital converter ADC, of up to 12-bits resolution, working at conversion rate of up to 10 MHz. So, combining these resources together, with few extra components, high-performance analog-to-digital conversion is possible. In the current paper possibility of achieving of up to 20-bit resolution and measurement of frequencies of frequencies to tens of kHz or even more - is proposed, investigated and discussed. A PWM is used as the DAC in the compensation feedback path of the total analog-to-digital conversion path.