Title: Out of lock detector for phase lock loop synthesizer

Abstract: In a radio synthesizer adapted for use in an aircraft transceiver, an out of lock detector which enables or inhibits output from the synthesizer depending upon whether the synthesizer phase lock loop is in or out of lock. Under normal in lock operating conditions the oscillator output is coupled to the input of an output amplifier. When the loop is out of lock, pulse signals are generated at the loop phase detector and peak integrated to produce a signal which inhibits transmission of the oscillator output to the output amplifier, so that no output is produced while the synthesizer searches for a selected frequency.

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Inventors: McClaskey, Boyd M. (Flourtown, PA, US)

Application Number: 522053
Filing Date: 1974-11-08
Publication_date: 1976-01-13
Assignee: Narco Scientific Industries, Inc. (Fort Washington, PA)
Primary Class(es): 331/25 331/74, 331/DIG2
Other Classes:
US Patent Ref:

3354403	Nov, 1967	Thomas	331/18.
3611175	Oct, 1971	Boelke	331/17.

Other Refs:
Primary Examiner: Grimm, Siegfried H.
Assistant Examiner:
Attorney: Paul & Paul