Phase detector circuit having latched output characteristic
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United States of America Patent
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Feb 13, 1990
Issued Date -
N/A
app pub date -
Nov 23, 1988
filing date -
Jul 1, 1987
priority date (Note) -
Expired
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Abstract
A phase detector circuit for providing an output indicative of the phase relationship between two input signals. The output of the phase detector responds rapidly to changes in the phase relationship between the input signals and avoids 'cycling' when this phase relationship is less than -2.pi. or greater than 2.pi.. The phase detector includes circuit means for detecting when the phase relationship is outside a desired range such as proportional phase detectors which operate in combination with a differential type phase detector for providing the required output.
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