Patent ID: 6018556
Filing Date: 2000-01-25
Classification: H03L,H04B,H04L

Abstract:
A communications receiver, comprising:an input that receives a received signal;a carrier recovery loop coupled to said input, wherein said carrier recovery loop receives the received signal and generates a reference signal therefrom, the carrier recovery loop comprising:an oscillator that generates the reference signal, anda loop filter coupled to said oscillator,wherein said loop filter is operable to place said carrier recovery loop in one of a plurality of operating modes in response to one or more gain coefficients, andwherein the plurality of operating modes includes a hold mode, wherein in the hold mode the oscillator holds the reference signal at a fixed frequency;a memory coupled to said loop filter, wherein said memory stores a first set of one or more gain coefficients for the hold mode,wherein said memory is operable to provide the first set of one or more gain coefficients to said loop filter to place the carrier recovery loop in the hold mode.