06141394 is referenced by 27 patents and cites 18 patents.

A fractional-N frequency synthesizer has a VCO with an output for supplying an output signal of a particular frequency, and an input for receipt of a control signal for controlling the operation of the VCO so that it locks in on a reference frequency. Compensation circuitry is coupled to the input for compensating the output signal for phase jitter. The compensation circuitry has a charge pump that supplies a compensation current to the input. The timing is derived from the output signal, thus rendering the compensation current independent of the frequency range of the VCO and of the reference frequency.

Title
Fractional-N frequency synthesizer with jitter compensation
Application Number
8/994826
Publication Number
6141394
Application Date
December 22, 1997
Publication Date
October 31, 2000
Inventor
Rainer Gaethke
Mountain View
CA, US
Daniel J Linebarger
Saratoga
CA, US
Agent
Robert McDermott
Peter Verdonk
Assignee
Philips Electronics North America Corporation
NY, US
IPC
H03L 7/18
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