Design of PWM(Pulse Width Modulation) Circuit Using OTA with a single-voltage supply

OTA를 이용한 단전원 구동 펄스폭 변조(Pulse Width Modulation) 회로 설계

  • 박선웅 (한양대학교 전자전기제어계측 공학과) ;
  • 김희준 (한양대학교 전자ㆍ컴퓨터 공학부) ;
  • 송재훈 (한양대학교 전자전기제어계측 공학과) ;
  • 이은진 (한양대학교 전자전기제어계측 공학과)
  • Published : 2003.07.01

Abstract

This paper proposes a PWM(Pulse Width Modulation) circuit using CMOS OTA with a single-voltage supply. The OTA employed has an input stage which consists of a pair of two MOSFETs operating in plural operation regions. The MOSFETs work complemetarily and realize a rail-to-rail input range. The input stage requires no matching of an n-channel type input circuit and a p-channel type input circuit unlike conventional rail-to-rail input stages because the input stage is realized by single channel type MOSFETs. In order to confirm the validity of the proposed circuit, it is simulated by H-SPICE program. Futhermore, the proposed circuit will be integrated on chip using 0.35 $\mu\textrm{m}$ CMOS technology.

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