Constant resolution frequency synthesizer
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United States of America Patent
Stats
-
Dec 30, 1986
Grant Date -
N/A
app pub date -
Feb 28, 1985
filing date -
Feb 28, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A frequency synthesizer which has a constant resolution over an octave frequency range is disclosed. The frequency synthesizer has a presettable high speed counter, a low speed counter, an adjusting counter, and a count selector. The low speed counter provides a first output signal whose frequency is rapidly alternated between two closely-spaced frequencies so that the average frequency of the output signal is the desired frequency. The adjusting counter determines the period of time that each of the closely-spaced frequencies is present at the output. The count selector determines the frequency of each of the two closely-spaced frequencies. The frequency synthesizer also has a phase splitter and provides a second output signal which is also of the desired frequency but which is phase-shifted by ninety degrees from the first output signal.
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