04859968 is referenced by 9 patents and cites 6 patents.

A frequency synthesizer system generates a clock signal having an adjustable, accurate and stable frequency. The synthesizer produces a first reference frequency FR and an adjustable first intermediate frequency F1 equal to the frequency FR divided by a selectable number (N2/N1) which permits course adjustment of the frequency in steps over a prescribed range. The frequencies FR and F1 are then mixed and filtered to produce a second intermediate frequency FR+F1. The system also generates a second reference frequency F3 which is finely adjustable over a range in the order of magnitude of the frequency difference between two successive steps of the first intermediate frequency F1. This second reference frequency is mixed with the second intermediate frequency and the result is filtered to produce a final frequency FR+F1+F3.

Title
Frequency generator
Application Number
7/232705
Publication Number
4859968
Application Date
August 16, 1988
Publication Date
August 22, 1989
Inventor
Ezra Gershon
East Meadow
NY, US
Agent
Felfe & Lynch
Assignee
Integrated Technologies Solutions
NY, US
IPC
H03L 7/18
H03B 21/02
View Original Source