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학술지 Capacitance Deviation-to-Time Interval Converter Using Current-Tunable Schmitt Triggers
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저자
김훈, 박지만, 정원섭, 김희준
발행일
201102
출처
IEICE Electronics Express, v.8 no.3, pp.155-160
ISSN
1349-2543
출판사
IEICE
DOI
https://dx.doi.org/10.1587/elex.8.155
초록
A capacitance deviation-to-time interval converter is presented for interfacing capacitive sensors. It consists of two ramp integrators, two current-tunable Schmitt triggers, and two logic gates. A prototype circuit built using discrete components exhibits a resolution as high as 13 bits and a linearity error less than 짹0.2% when the output pulse width is counted by a 20MHz clock signal. Its application to a humidity sensor is also presented. © IEICE 2011.
키워드
Capacitance measurement, Capacitive sensor, Schmitt trigger
KSP 제안 키워드
Capacitive sensor, Humidity sensors, Logic gate, Schmitt Trigger(ST), Time interval, capacitance measurement, clock signal, current-tunable, linearity error, pulse width