The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A CMOS Band-Pass Delta Sigma Modulator and Power Amplifier for Class-S Amplifier Applications

S급 전력 증폭기 응용을 위한 CMOS 대역 통과델타 시그마 변조기 및 전력증폭기

  • Lee, Yong-Hwan (Department of Electronic and Radio Eng., Kyung Hee University) ;
  • Kim, Min-Woo (Department of Electronic and Radio Eng., Kyung Hee University) ;
  • Kim, Chang-Woo (Department of Electronic and Radio Eng., Kyung Hee University)
  • Received : 2014.05.21
  • Accepted : 2014.10.06
  • Published : 2015.01.30
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Abstract

A CMOS band-pass delta-sigma modulator(BPDSM) and cascode class-E power amplifier have been developed CMOS for Class-S power amplifier applications. The BPDSM is operating at 1-GHz sampling frequency, which converts a 250-MHz sinusoidal signal to a pulse-width modulated digital signal without the quantization noise. The BPDSM shows a 25-dB SQNR(Signal to Quantization Noise Ratio) and consumes a power of 24 mW at an 1.2-V supply voltage. The class-E power amplifier exhibits an 18.1 dBm of the maximum output power with a 25% drain efficiency at a 3.3-V supply voltage. The BPDSM and class-E PA were fabricated in the Dongbu's 110-nm CMOS process.

S급 전력 증폭기 응용을 위한 CMOS 대역 통과 델타 시그마 변조기(BPDSM)와 캐스코드 E급 전력 증폭기를 설계 및 제작 하였다. 대역 통과 델타 시그마 변조기는 1 GHz의 샘플링 주파수로 250 MHz의 입력 신호를 펄스폭 변조 방식의 디지털 신호로 변조하며 양자화 잡음을 효과적으로 제거하였다. 대역 통과 델타 시그마 변조기는 25 dB의 SQNR을 가지며 1.2 V 전원 전압에서 24 mW의 전력을 소비한다. 캐스코드 E급 전력 3.3V 전원에서 동작하며 최대 18.1 dBm의 출력 전력을 가지며 25%의 드레인 효율을 보였다. 두 회로 모두 동부 0.11 um RF CMOS 공정으로 제작되었다.

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References

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