Patent ID: 6526113
Filing Date: 2003-02-25
Classification: H03L

Abstract:
A control loop comprising:a detector configured to receive an input signal and a reference signal and to provide a detector output signal indicative of a difference between the input signal and the reference signal; a lowpass filter coupled to the detector and configured to receive the detector output signal and to provide a filtered signal; a transconductance (gm) amplifier coupled to the lowpass filter and configured to receive the filtered signal and to provide a current output signal, wherein use of the filtered signal facilitates design requirements of the gm amplifier thereby improving operations thereof; a loop filter coupled to the gm amplifier and configured to receive the current output signal and to provide a control signal; and an oscillator coupled to the loop filter and configured to receive the control signal and to provide an oscillator signal having a property that is adjusted by the control signal, and wherein the reference signal is adjusted by the oscillator signal.