A cost-effective angle demodulator IC for path matched differential interferometry based sensors

Hao-Chiao Hong, Yun Tse Chen, Shao Feng Hung, Chin Cheng Wu, Yi Chiu

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

The angle demodulator ( ADM) is a key component for the path matched differential interferometry (PMDI) sensors. Conventional ADMs require tens of operational amplifiers (OPAMPs) and bulky capacitors and resistors, making them difficult to be realized as integrated circuits (ICs). This paper presents the first ADM IC design that requires only one OPAMP and thus saves significant area and power. In addition, this novel ADM design tolerates a wide range of modulation depth of the optical interferometer of the PMDI sensors. As a result, the yield of the PMDI sensor significantly increases. A test chip has been designed and successfully verified in O.18-μm CMOS. The active area of the proposed circuits is only 476 by 368 μm2 and it consumes only 6.26 mW.

Original languageEnglish
Article number6984970
Pages (from-to)209-212
Number of pages4
JournalProceedings of IEEE Sensors
Volume2014-December
Issue numberDecember
DOIs
StatePublished - 12 Dec 2014
Event13th IEEE SENSORS Conference, SENSORS 2014 - Valencia, Spain
Duration: 2 Nov 20145 Nov 2014

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