Volume 35 Issue 2
Dec.  2017
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Article Navigation >  Journal of University of Electronic Science and Technology of China  > 2006  >  35(2): 193-195,199

XI You-bao, ZHAN Hui-qin, GU Tian-xiang. Research on Synchronous-PWM-Based High Resolution A-D Conversion[J]. Journal of University of Electronic Science and Technology of China, 2006, 35(2): 193-195,199.
Citation: XI You-bao, ZHAN Hui-qin, GU Tian-xiang. Research on Synchronous-PWM-Based High Resolution A-D Conversion[J]. Journal of University of Electronic Science and Technology of China, 2006, 35(2): 193-195,199.
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Research on Synchronous-PWM-Based High Resolution A-D Conversion

  • 1.

    School of Electronic Engineering,UEST of China Chengdu 610054;

  • 2.

    School of Automation Engineering,UEST of China Chengdu 610054

  • Received Date: 2006-01-12
  • Publish Date: 2006-04-15
  • It is difficult to elevate resolution higher for Synchronous Voltage-to-Frequency Converter (SVFC) since its phase modulation characteristic and the restrict of output frequency upper limit. There are some approaches to elevate its resolution higher, for example, taking the technique of integrating charge balancing and slope voltage integral. In this paper, a novel principle and implementation technology based on synchronous Pulse-Width-Modulation (SPWM) mode via dual comparators for integral is brought forward. Its basic principle is charge balancing enough within one period via integral between two reference levels, and the integral time can be fine adjusted by higher frequency synchronous clock. Moreover, charge balancing can be dynamicly adjusted within gate time by multi-periods synchronous measurement method. Verifying test indicates that its resolution is better than 5 digits, and linearity referenced to Method of Least Square better than 0.005%.
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  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Research on Synchronous-PWM-Based High Resolution A-D Conversion

  • 1. School of Electronic Engineering,UEST of China Chengdu 610054;
  • 2. School of Automation Engineering,UEST of China Chengdu 610054
  • Received Date: 2006-01-12
  • Publish Date: 2006-04-15

Abstract: It is difficult to elevate resolution higher for Synchronous Voltage-to-Frequency Converter (SVFC) since its phase modulation characteristic and the restrict of output frequency upper limit. There are some approaches to elevate its resolution higher, for example, taking the technique of integrating charge balancing and slope voltage integral. In this paper, a novel principle and implementation technology based on synchronous Pulse-Width-Modulation (SPWM) mode via dual comparators for integral is brought forward. Its basic principle is charge balancing enough within one period via integral between two reference levels, and the integral time can be fine adjusted by higher frequency synchronous clock. Moreover, charge balancing can be dynamicly adjusted within gate time by multi-periods synchronous measurement method. Verifying test indicates that its resolution is better than 5 digits, and linearity referenced to Method of Least Square better than 0.005%.

XI You-bao, ZHAN Hui-qin, GU Tian-xiang. Research on Synchronous-PWM-Based High Resolution A-D Conversion[J]. Journal of University of Electronic Science and Technology of China, 2006, 35(2): 193-195,199.
Citation: XI You-bao, ZHAN Hui-qin, GU Tian-xiang. Research on Synchronous-PWM-Based High Resolution A-D Conversion[J]. Journal of University of Electronic Science and Technology of China, 2006, 35(2): 193-195,199.
shu

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