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    초록·키워드

    A 950 MHz CMOS frequency synthesizer for mobile communication transceivers is designed and fabricated in a 0.8 µm standard CMOS process. A new type of biasing circuit is successfully implemented, which can compensate the effect of chip-to-chip threshold voltage variations on the center frequency of the VCO. With this new technique, the standard deviation of the VCO center frequency is reduced to 16.7 MHz from the conventional result of 28.1 MHz. For the low noise requirement of mobile transceivers, the current mode logic prescaler and the differential signaling are used. The process insensitive RF frequency synthesizer demonstrates a phase noise of -92 dBc/Hz at 885 kHz offset from the 950.4 MHz carrier with a 23.7 ps rms jitter.

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      UCI(KEPA) : I410-ECN-0101-2009-569-013239719