Frequency synthesizer

Details Frequency synthesizer Frequency synthesizer

1989-12-22

1990-10-16

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 16, 331 25, 455260, H03L 716

Patent

active

049638386

ABSTRACT:
A frequency synthesizer having first and second PLLs coupled by a mixer to provide an output signal which changes in predetermined frequency steps or increments is capable of operation in a first frequency change mode in which frequencies of output signals from the first and second PLLS change in the same direction or in a second frequency change mode in which the frequencies of the output signals from the first and second PLLs change in opposite directions, and the first or second frequency change mode is selected on the basis of a dividing ratio employed in one of the first and second PLLs.

REFERENCES:
patent: 4305045 (1981-12-01), Metz et al.

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