초록

본 논문은 회로 구성 블록으로 CMOS 연산 트랜스컨덕턴스 증폭기(OTA)를 사용한 새로운 3.3-1 V 동기식 buck DC/DC 컨버터를 제안한다. PWM 회로의 오차 증폭기 OTA는 온도 안정성 향상을 위해 보상되었다. 보상된 OTA 트랜스컨덕턴스 이득의 온도 계수는 $0-100^{\circ}C$ 범위에서 $150\;ppm/^{\circ}C$ 이하이다. $0.35{\mu}m$ 표준 CMOS 공정으로 HSPICE 시뮬레이션을 수행한 결과는 40-125 mA의 부하 전류 범위에서 제안된 컨버터의 효율이 80% 이상임을 보여준다. 이러한 결과는 제안된 컨버터가 전지로 동작되는 시스템에 이용하기에 적당함을 보여준다.

Abstract

This paper presents a new 3.3-1 V synchronous buck DC/DC converter that employs CMOS operational transconductance amplifiers (OTAs) as circuit-building blocks. An error amplifier OTA in a PWM circuit is compensated for to improve temperature stability. The temperature coefficient of the transconductance gain of the compensated OTA is less than $150\;ppm/^{\circ}C\;over\;0-100^{\circ}C$. The HSPICE simulation results of the $0.3{\mu}m$ standard CMOS technology show that the efficiency of the proposed converter is as high as 80% in the load current range of 40-125 mA. These results show that the proposed converter is adequate for use in battery-operated systems.

주제어

#Synchronous buck converters   #Operational transconductance amplifiers   #Analog integrated circuits  

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참고문헌 (12)

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