Switched-capacitor self-oscillating capacitance transducers with duty-cycle or digital output

A. Cichocki, R. Unbehauen

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


A current trend in the design of integrated transducers is the increasing demand for transducers which are directly able to communicate with microprocessors. The only analog output signals which are suited for such transducers are pulse-width (PWM) and frequency modulated (FM) signals. Such signals can easily be digitized by counting periods. Moreover, the signals can easily be transmitted over long distances. This paper is devoted to switched-capacitor (SC) capacitance transducers with pulse-width (duty-cycle) modulated square-wave output voltages. A pulse-width modulation (PWM) signal can be regarded as an intermediate step between analog and digital signals. Such an analog signal can be delivered to a microprocessor without any extra interfacing. We will discuss the realization of SC capacitance transducers.

Original languageEnglish
Pages (from-to)185-189
Number of pages5
JournalIEE Conference Publication
Issue number308
Publication statusPublished - 1989
Externally publishedYes
EventEuropean Conference on Circuit Theory and Design - Brighton, Engl
Duration: 5 Sep 19898 Sep 1989


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