Evaluation of low-voltage CMOS differential amplifier for smartphone sensing

Kyohei Kawamura, Yoshinori Matsumoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The purpose of this study is to design a low voltage differential amplifier circuit driven by the audio interface to realize the sensing device without external power supply. The pseudo-differential amplifier was designed using a inverter-based subtracting circuit with 0.18μm standard CMOS process. The maximum differential gain was measured as 51.4dB at 1V supply voltage, and the CMRR was 45.1dB. The input offset temperature drift is 1.5μV/ 'C. In addition, the simulation was carried out for the sensing circuit in the smartphone configuration.

Original languageEnglish
Title of host publicationProceedings of IEEE Sensors
Publication statusPublished - 2012
Event11th IEEE SENSORS 2012 Conference - Taipei, Taiwan, Province of China
Duration: 2012 Oct 282012 Oct 31


Other11th IEEE SENSORS 2012 Conference
CountryTaiwan, Province of China


ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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