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

doi:10.1109/ICSENS.2014.6984970

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

Department of Electrical and Computer Engineering

Research output: Contribution to journal › Conference article › peer-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 language	English
Article number	6984970
Pages (from-to)	209-212
Number of pages	4
Journal	Proceedings of IEEE Sensors
Volume	2014-December
Issue number	December
DOIs	https://doi.org/10.1109/ICSENS.2014.6984970
State	Published - 12 Dec 2014
Event	13th IEEE SENSORS Conference, SENSORS 2014 - Valencia, Spain Duration: 2 Nov 2014 → 5 Nov 2014

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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.",

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AU - Hong, Hao-Chiao

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AU - Chiu, Yi

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AB - 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.

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

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