SWITCHED-CAPACITOR TRANSDUCERS WITH DIGITAL OR DUTY-CYCLE OUTPUT BASED ON PULSE-WIDTH MODULATION TECHNIQUE

被引：5

作者：

CICHOCKI, A ^{[1
]}

UNBEHAUEN, R ^{[1
]}

机构：

[1] UNIV ERLANGEN NURNBERG,W-8520 ERLANGEN,GERMANY

来源：

INTERNATIONAL JOURNAL OF ELECTRONICS | 1991年 / 71卷 / 02期

关键词：

D O I：

10.1080/00207219108925474

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 [电气工程]; 0809 [电子科学与技术];

摘要：

New switched-capacitor transducers for capacitive or resistive sensors have been developed based on a pulse-width modulation technique. The output signal is a duty-cycle modulated square-wave voltage or a binary-coded digital signal which can be accurately related to the value of the unknown capacitance or resistance. Several different configurations of transducers have been proposed to meet different requirements and/or to compensate parasitic and non-ideal effects such as the offset voltage and noise of an op.-amp., stray capacitances and the parasitic charge injection due to the clock feedthrough effect of MOS switches. The properties of the proposed transducers and their performance are demonstrated using computer simulation.

引用

页码：265 / 278

页数：14

共 10 条

[1]

A USE OF DOUBLE INTEGRATION IN SIGMA DELTA MODULATION [J].