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摘要
A novel 1.57GHz complementary metaloxide semiconductor inductorcapacitor voltage-controlled oscillator with the common-mode replica compensation is introduced for mixed-signal system-on-chip applications. In order to alleviate power line disturbances, the center tap node of differential symmetric inductor and the replica biasing circuit are adopted in the differential voltage regulating unit to reduce power supply sensitivity. In addition, this proposed design also leads to low tuning gain and low power dissipation. The post-layout simulation results under the Taiwan Semiconductor Manufacturing Company's mixed-signal 0.18 mu m 1P6M process show that the proposed design achieves power supply rejection of 68.6dB at low frequencies and 1.2MHz/V pushing sensitivity. It exhibits phase noise of 130.6dBc/Hz at a 1MHz offset from a 1.57GHz carrier yet dissipates only 5.58mW under a 1.8V power supply.
