Pub Date : 1973-11-01DOI: 10.1109/TBTR1.1973.299771
J. Hicks, A. Hopengarten
{"title":"Low-Cost SCR Line-Connected DC Regulator","authors":"J. Hicks, A. Hopengarten","doi":"10.1109/TBTR1.1973.299771","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299771","url":null,"abstract":"","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129782511","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 : 1973-11-01DOI: 10.1109/TBTR1.1973.299774
R. Peterson
With the advent of four channel sound, higher power amplifiers and a trend toward component systems, there is a need for reduced size and weight in audio systems. The conventional transformer, rectifier and large filter capacitor power supply represents a large percentage of the total space and weight of an amplifier system; therefore, this is a logical starting point for a space and weight reduction program.
{"title":"Switch Mode Power Supplies - A New Approach for Consumer Audio Systems","authors":"R. Peterson","doi":"10.1109/TBTR1.1973.299774","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299774","url":null,"abstract":"With the advent of four channel sound, higher power amplifiers and a trend toward component systems, there is a need for reduced size and weight in audio systems. The conventional transformer, rectifier and large filter capacitor power supply represents a large percentage of the total space and weight of an amplifier system; therefore, this is a logical starting point for a space and weight reduction program.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117268045","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 : 1973-11-01DOI: 10.1109/TBTR1.1973.299770
S. Yoshida, A. Ohkoshi, S. Miyaoka
Black and white picture tubes, with the exception of certain special purpose tubes, are currently all nearly wide-angle deflection types. Similarly, wide deflection angles are now being adopted in the color picture tube field. Since the principle of the color picture tube is far more complex than that of the black and white tube, a sophisticated production technology is necessary, and consequently production techniques of wide deflection angle color tubes are less advanced at present. Companies producing the conventional 3-gun shadow mask tube recently have successively announced improvement of their mass production technology and have greatly changed the design of the tube itself in their efforts to achieve ease of production comparable to that of the 90°deflection tube. Since their principal objective is to make the picture tube thinner, achievement of picture quality at the same level as in the 90°deflection tube is one of the problems.
{"title":"A Wide-Deflection Angle (114°) Trinitron Color-Picture Tube","authors":"S. Yoshida, A. Ohkoshi, S. Miyaoka","doi":"10.1109/TBTR1.1973.299770","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299770","url":null,"abstract":"Black and white picture tubes, with the exception of certain special purpose tubes, are currently all nearly wide-angle deflection types. Similarly, wide deflection angles are now being adopted in the color picture tube field. Since the principle of the color picture tube is far more complex than that of the black and white tube, a sophisticated production technology is necessary, and consequently production techniques of wide deflection angle color tubes are less advanced at present. Companies producing the conventional 3-gun shadow mask tube recently have successively announced improvement of their mass production technology and have greatly changed the design of the tube itself in their efforts to achieve ease of production comparable to that of the 90°deflection tube. Since their principal objective is to make the picture tube thinner, achievement of picture quality at the same level as in the 90°deflection tube is one of the problems.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131849707","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 : 1973-11-01DOI: 10.1109/TBTR1.1973.299769
P. T. King
This paper presents a description of the theory and operation of a new television add-on data communication system which does not utilize the vertical interval. The basic add-on signalling technique allows more efficient utilization of the television spectrum. Added information, producing no perceptible interference with either the picture, or ancillary and test signals, is sent through a television channel along with the standard video signal. Novel techniques to significantly reduce errors in the data channel will be described. Several interesting systems utilizing this new signalling method have been built and will be described in this paper.
{"title":"A Novel TV Add-On Data Communication System","authors":"P. T. King","doi":"10.1109/TBTR1.1973.299769","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299769","url":null,"abstract":"This paper presents a description of the theory and operation of a new television add-on data communication system which does not utilize the vertical interval. The basic add-on signalling technique allows more efficient utilization of the television spectrum. Added information, producing no perceptible interference with either the picture, or ancillary and test signals, is sent through a television channel along with the standard video signal. Novel techniques to significantly reduce errors in the data channel will be described. Several interesting systems utilizing this new signalling method have been built and will be described in this paper.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133521925","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 : 1973-11-01DOI: 10.1109/TBTR1.1973.299780
Dirk deWeger, C. Eilers, P. Fockens, Howard F. Prosser
The Zenith Quadraphonic FM Broadcast Systems (NQRC designations, 2A, 3B) are capable of broadcasting four discrete audio signals and are compatible with existing monophonic and biphonic FM services as well as with the Subsidiary Communication Authorization (SCA) service presently in practice. Two additional subchannels are broadcast in addition to the monophonic channel and the biphonic subchannel to accommodate the additional audio signals. The first of these additional subchannels uses double sideband suppressed carrier (DSBSC) AM modulation and is broadcast in quadrature with the existing biphonic subchannel at 38 kHz. System 2A, utilizing upper single sideband suppressed carrier (SSBSC) AM, broadcasts the second additional subchannel at 76 kHz while system 3B, utilizing vestigial sideband suppressed carrier (VSBSC) AM, broadcasts the second additional subchannel at 90.25 kHz. Both systems provide the necessary spectrum for the existing SCA subchannel centered nominally around 67 kHz. Standard pre-emphasis is employed to broadcast the four discrete audio signals in the band from 50 Hz to 15 kHz. Both systems broadcast an additional pilot subcarrier (at 76 kHz for system 2A and at 90.25 kHz for system 3B) to provide automatic decoder operation for monophonic, biphonic or quadraphonic signals. Sufficient phase linearity is maintained in the baseband spectrum (50 Hz to 91 kHz for system 2A, 50 Hz to 93 kHz for system 3B) to assure adequate separation between the audio outputs.
{"title":"Two Proposed Quadraphonic FM Broadcasting Systems","authors":"Dirk deWeger, C. Eilers, P. Fockens, Howard F. Prosser","doi":"10.1109/TBTR1.1973.299780","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299780","url":null,"abstract":"The Zenith Quadraphonic FM Broadcast Systems (NQRC designations, 2A, 3B) are capable of broadcasting four discrete audio signals and are compatible with existing monophonic and biphonic FM services as well as with the Subsidiary Communication Authorization (SCA) service presently in practice. Two additional subchannels are broadcast in addition to the monophonic channel and the biphonic subchannel to accommodate the additional audio signals. The first of these additional subchannels uses double sideband suppressed carrier (DSBSC) AM modulation and is broadcast in quadrature with the existing biphonic subchannel at 38 kHz. System 2A, utilizing upper single sideband suppressed carrier (SSBSC) AM, broadcasts the second additional subchannel at 76 kHz while system 3B, utilizing vestigial sideband suppressed carrier (VSBSC) AM, broadcasts the second additional subchannel at 90.25 kHz. Both systems provide the necessary spectrum for the existing SCA subchannel centered nominally around 67 kHz. Standard pre-emphasis is employed to broadcast the four discrete audio signals in the band from 50 Hz to 15 kHz. Both systems broadcast an additional pilot subcarrier (at 76 kHz for system 2A and at 90.25 kHz for system 3B) to provide automatic decoder operation for monophonic, biphonic or quadraphonic signals. Sufficient phase linearity is maintained in the baseband spectrum (50 Hz to 91 kHz for system 2A, 50 Hz to 93 kHz for system 3B) to assure adequate separation between the audio outputs.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123263138","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 : 1973-11-01DOI: 10.1109/TBTR1.1973.299782
E. Torick
{"title":"The SQ/sup TM/ Broadcast System","authors":"E. Torick","doi":"10.1109/TBTR1.1973.299782","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299782","url":null,"abstract":"","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130910270","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 : 1973-11-01DOI: 10.1109/TBTR1.1973.299772
Harold J. Benzuly, John G. Konopka, Kenneth A. Merriweather
The development of Touch-Tuning Systems for television receivers marks the first significant change in this function in twenty-five years. Impetus for the change has been provided by the availability of solid-state, varactor VHF and UHF tuners which have the advantage of no moving parts, together with silent, instantaneous control by dc voltages.
{"title":"A Touch, Varactor Tuning System for Television Receivers","authors":"Harold J. Benzuly, John G. Konopka, Kenneth A. Merriweather","doi":"10.1109/TBTR1.1973.299772","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299772","url":null,"abstract":"The development of Touch-Tuning Systems for television receivers marks the first significant change in this function in twenty-five years. Impetus for the change has been provided by the availability of solid-state, varactor VHF and UHF tuners which have the advantage of no moving parts, together with silent, instantaneous control by dc voltages.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125218266","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 : 1973-08-01DOI: 10.1109/TBTR1.1973.299759
K. Moulding
An electronic gyrator is a two-port capable of transforming a capacitor into an inductance and therefore allows one to construct a tuned circuit using only transistors, resistors and capacitors. At frequencies below say 1 MHz it is possible to simulate inductance of high purity, but the value of capacitance required demands the use of discrete capacitors. The cost advantage of monolithic circuitry is therefore denied, but very high performance tuned circuits are possible.
{"title":"Fully Integrated Selectivity at High Frequency Using Gyrators","authors":"K. Moulding","doi":"10.1109/TBTR1.1973.299759","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299759","url":null,"abstract":"An electronic gyrator is a two-port capable of transforming a capacitor into an inductance and therefore allows one to construct a tuned circuit using only transistors, resistors and capacitors. At frequencies below say 1 MHz it is possible to simulate inductance of high purity, but the value of capacitance required demands the use of discrete capacitors. The cost advantage of monolithic circuitry is therefore denied, but very high performance tuned circuits are possible.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127441294","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 : 1973-08-01DOI: 10.1109/TBTR1.1973.299757
Roger C. Thielking, A. V. Korolenko
An Automatic Chroma Control (ACC) amplifier was developed using for gain control a conventional small signal transistor operating as a variable degeneration element in the emitter of the amplifier stage. The gain-control transistor was operating around the knee of its collector characteristic, and acted like a linear variable resistor. The resistance was controlled by a small DC current in the base. Mathematically, the behavior of such transistor was described by Ebers and Moll in 1954 -hence the name.
{"title":"The Ebers-Moll Effect Transistor Used as a Low-Value Controlled Resistor in ACC and Other Variable-G","authors":"Roger C. Thielking, A. V. Korolenko","doi":"10.1109/TBTR1.1973.299757","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299757","url":null,"abstract":"An Automatic Chroma Control (ACC) amplifier was developed using for gain control a conventional small signal transistor operating as a variable degeneration element in the emitter of the amplifier stage. The gain-control transistor was operating around the knee of its collector characteristic, and acted like a linear variable resistor. The resistance was controlled by a small DC current in the base. Mathematically, the behavior of such transistor was described by Ebers and Moll in 1954 -hence the name.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116536949","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 : 1973-08-01DOI: 10.1109/TBTR1.1973.299758
J. Olson, J. Brennan
In recent years the FCC has, through legislation, placed increasing requirements on television and tuner manufacturers to provide tuning of both VHF and UHF channels on an equal basis together with a means of indicating the exact channel number. FCC Part 15 Regulations state, "If any television receiver is equipped to provide repeated access to UHF television channels at discrete tuning positions, the manufacturer shall provide for the display of the precise UHF channel selected or shall provide to the user a means of identifying the precise channel selected..." In applications using varactor VHF/ UHF tuners with all electronic channel selection, there is no rotary shaft on which to fasten a channel indicator dial. Some means of channel number display other than mechanical is then necessary.
{"title":"The Practical Application of \"On-Screen\" Display to a Television Receiver","authors":"J. Olson, J. Brennan","doi":"10.1109/TBTR1.1973.299758","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299758","url":null,"abstract":"In recent years the FCC has, through legislation, placed increasing requirements on television and tuner manufacturers to provide tuning of both VHF and UHF channels on an equal basis together with a means of indicating the exact channel number. FCC Part 15 Regulations state, \"If any television receiver is equipped to provide repeated access to UHF television channels at discrete tuning positions, the manufacturer shall provide for the display of the precise UHF channel selected or shall provide to the user a means of identifying the precise channel selected...\" In applications using varactor VHF/ UHF tuners with all electronic channel selection, there is no rotary shaft on which to fasten a channel indicator dial. Some means of channel number display other than mechanical is then necessary.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129995964","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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