Control device for a phase lock loop vernier frequency synthesiz

Details Control device for a phase lock loop vernier frequency synthesiz Control device for a phase lock loop vernier frequency synthesiz

1979-09-24

1980-11-18

Smith, Jerry

Boots, shoes, and leggings

307271, 328 15, 328 39, 364703, G06F 768

Patent

active

042349290

ABSTRACT:
Disclosed is a device for controlling the selection of divider factors in a vernier frequency synthesizer employing a pair of phase lock loops coupled through a mixer to supply a synthesized output signal frequency. The control device generates a pair of divider factors for the respective programmable dividers of the two loops which will generate a particular synthesized output frequency and avoids predetermined divider factors such as those which are not processable by programmed dividers of the loops or which would generate frequencies within the loops causing spurious mixing products with other signals. The control device preferably takes the form of a microprocessor.

REFERENCES:
patent: 3353104 (1967-11-01), Loposer
patent: 3769597 (1973-10-01), Mayer
patent: 3882403 (1975-05-01), Gerken
patent: 3913028 (1975-10-01), Bosselaers

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