Frequency synthesizer

Details Frequency synthesizer Frequency synthesizer

1994-02-15

1995-10-17

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synthesizer

327132, 327107, 327129, 364607, H03K 378

Patent

active

054594189

ABSTRACT:
A saw-tooth waveform signal generating circuit (3) generates a saw-tooth waveform signal d in response to a timing signal b derived from a reference clock a. A voltage comparator (4) slices the saw-tooth waveform signal with a reference voltage to shape the waveform thereof, thereby producing a synthesizer output e having a rectangular waveform. A counter (5) adds or subtracts a predetermined value every time a reference clock arrives. The count of the counter (5) is converted to an analog value by a DAC (6) and then is applied to, for example, the saw-tooth waveform signal generating circuit as a bias. As a result, the voltage for causing the saw-tooth waveform signal to start rising or falling is manipulated to allow the voltage comparator to slice the saw-tooth waveform signal at any desired timing. Hence, a synthesizer output can be produced in any desired phase.

REFERENCES:
patent: 3735269 (1973-05-01), Jackson
patent: 3882403 (1975-05-01), Gerken
patent: 4792914 (1988-12-01), Dartois et al.

Affiliated with

Also associated with

Rating

Frequency synthesizer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency synthesizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency synthesizer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-600190