A low-power oscillator-based readout interface for medical ultrasonic sensors

Teng Chuan Cheng, Chih Wei Chen Hsu, Hui Chun Wang, Tsung Heng Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper proposed an oscillator-based ultrasonic sensor interface that can be applied to intravascular applications. The readout circuits are validated with a capacitive micromachined ultrasonic transducer (CMUT) and a current-to-frequency chip. The CMOS CMUTs are integrated with a current amplifier on the same chip and the current-to-frequency chip provides the current-to-frequency readout interface. Relaxation oscillators with injection locking are employed to achieve low-power consumption. Also, the time-based output signal can be further digitized with a time-to-digital converter. Both chips are fabricated in a 0.35μm CMOS MEMS process technology. The CMUTs are designed with 1MHz to 4MHz cells for intravascular diagnosis applications. The current amplifier consumes 281.7 μW and the power consumption of the current-to-frequency circuits is 25.4 μW.

Original languageEnglish
Title of host publication2016 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467394987
DOIs
StatePublished - 31 May 2016
Event2016 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2016 - Hsinchu, Taiwan
Duration: 25 Apr 201627 Apr 2016

Publication series

Name2016 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2016

Conference

Conference2016 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2016
Country/TerritoryTaiwan
CityHsinchu
Period25/04/1627/04/16

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