| 摘要 |
A voltage control oscillator (VCO) buffer for a local oscillator (LO) generator system of a phase locked loop (PLL) in a transceiver chip. The VCO buffer includes a capacitor bank, a VCO buffer core and a current stirring unit. The VCO buffer core receives an input signal, and outputs an output signal. The input signal and the output signal have substantially the same frequency. A capacitance of the capacitor bank and a magnitude of a current supplied by the current stirring unit are variable depending on a frequency of the input signal.
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