Patent ID: 7119628

Claim:
A device comprising: a controllable oscillator; a charge pump coupled to said controllable oscillator; a biased current source coupled to said charge pump to control a gain drop off of said charge pump, said current source including a complementary structure including an N-type metal oxide semiconductor and a P-type metal oxide semiconductor stack to either source or sink current based on a control voltage and an N-type metal oxide semiconductor and P-type metal oxide semiconductor to mirror said source or sink current into said charge pump; and circuitry operably coupled to said controllable oscillator to sense a voltage that controls said controllable oscillator and to digitally control a gain compensation to compensate for a drop off in a gain within a phase-locked loop, said circuitry including: a sensing logic to detect the drop in the gain of said controllable oscillator; and a variable gain stage that is digitally controllable to adjust the gain based on the drop in the feed-forward manner responsive to said sensing logic.