Invention Grant
US07915963B2 Current controlled oscillation device and method having wide frequency range 失效
电流控制振荡装置及方法频率范围宽

Current controlled oscillation device and method having wide frequency range
Abstract:
A current controlled, phase locked loop device includes a phase detector configured to compare a reference frequency to an output frequency of a current controlled oscillator (ICO), a charge pump coupled to the phase detector and a low pass filter coupled to the charge pump. A voltage to current (V to I) converter is coupled to the low pass filter, providing an output current for integral control of the ICO. A control circuit is coupled to the ICO, and receives increment and decrement outputs of the phase detector, wherein the control circuit is configured to provide proportional control of the ICO through an amount of bias current applied thereto.
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