(EN) A resonator of a VCO includes a fine tuning main varactor circuit, an auxiliary varactor circuit, and a coarse tuning capacitor bank circuit coupled in parallel with an inductance. The main varactor circuit includes a plurality of circuit portions that can be separately disabled. Within each circuit portion is a multiplexing circuit that supplies a selectable one of either a fine tuning control signal (FTAVCS) or a temperature compensation control signal (TCAVCS) onto a varactor control node within the circuit portion. If the circuit portion is enabled then the FTAVCS is supplied onto the control node so that the circuit portion is used for fine tuning. If the circuit portion is disabled then the TCAVCS is supplied onto the control node so that the circuit portion is used to combat VCO frequency drift as a function of temperature. How the voltage of the TCAVCS varies with temperature is digitally programmable.
(ZH)
VCO的谐振器包括与电感并联的微调主变容管电路、辅助变容管电路、以及粗调电容器组电路。该主变容管电路包括多个可分开地禁用的电路部分。在每个电路部分内有复用电路，该复用电路将微调控制信号（FTAVCS）或温度补偿控制信号（TCAVCS）中可选择的一个供应至该电路部分内的变容管控制节点上。若该电路部分被启用，则该FTAVCS被供应至该控制节点上，从而该电路部分被用于微调。如果该电路部分被禁用，则该TCAVCS被供应至该控制节点上，从而该电路部分被用于对抗归因于温度的VCO频率漂移。该TCAVCS的电压随温度如何变化是数字可编程的。