Phase-locked loop with a locking aid circuit
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United States of America Patent
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Sep 14, 1999
Grant Date -
N/A
app pub date -
Mar 24, 1998
filing date -
Mar 25, 1997
priority date (Note) -
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Abstract
A phase-locked loop of the type including a locking aid circuit providing a d.c. presetting signal representative of the carrier frequency of an input signal to set the quiescent frequency of a controlled oscillator of the phase-locked lop. The locking aid circuit includes a monostable latch clocked by the input signal to provide pulses of predetermined width, the presetting signal corresponding to the mean value of these pulses.
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