A 950 MHz CMOS RF frequency synthesizer for CDMA wireless transceivers

CDMA 이동 통신 단말기용 950 MHz CMOS RF 주파수 합성기

  • 김보은 (고려대학교 전기전자전파공학부) ;
  • 김수원 (고려대학교 전기전자전파공학부)
  • Published : 1997.07.01

Abstract

A CMOS 950 MHz frequency synthesizer is designed and fabricated in a 0.8.mu.m standard CMOS process for IS-95-A CDMA mobile communication transceivers To utilize a CMOS ring VCO in a CDMA wireless communication receisver, we employed a QDC (quasi-direct conversion) receiver architecture for CDMA applications. Realized RF frequency synthesizer used as the RF local oscillator for a QDC receiver exhibits a phase noise of -92 dBc/Hz at 885kHz offset from the 950.4 MHz carrier, which complies with IS-95-A CDMA specification. It has a rms jitter of 23.7 ps, and draws 30mA from a 5V supply. Measured I/Q phase error of the 950.4 output signals is 0.7 degree.

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