Patent ID: 8073416
Filing Date: 2011-12-06
Classification: H03J,H03L

Abstract:
1. A method comprising: receiving an instruction to change a power state of a voltage controlled oscillator (VCO) of a locked phase-locked loop (PLL) within a local oscillator, wherein the local oscillator is part of an RF communication device, wherein the PLL has a loop bandwidth, and wherein a bias current is supplied to the VCO; widening the loop bandwidth of the locked PLL in response to receiving the instruction; changing the bias current supplied to the VCO after widening the loop bandwidth of the locked PLL; narrowing the loop bandwidth of the locked PLL after changing the bias current supplied to the VCO; and detecting an input voltage supplied to the VCO, wherein the bias current supplied to the VCO is a function of at least the detected input voltage and the instruction.