Title: Phase locked oscillator

Abstract: In a phase locked oscillator (PLO), the frequency of a voltage controlled oscillator (VCO) is changed in response to error signals indicating the phase error between the individual pulses of a stream of input pulses and the output pulses of the PLO. The running of the PLO is temporarily interrupted whenever the phase error exceeds a predetermined amount, and is restarted in phase with the next input pulse from the stream of pulses. A residual part of the error signal causing the interruption is accumulated so that after each interruption the frequency of the oscillator is closer to the frequency of the input stream of pulses. The process is repeated as required until phase lock is achieved.

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Inventors: Taylor, John Richard (Bishopstoke, EN)

Application Number: 543586
Filing Date: 1975-01-23
Publication_date: 1976-02-17
Assignee: International Business Machines Corporation (NY)
Primary Class(es): 331/14 331/1A, 331/10, 331/17
Other Classes:
US Patent Ref:

3825855

Jul, 1974

Basset

331/14.

Other Refs: 220,074

Oct, 1958	AU

Primary Examiner: Kominski, John
Assistant Examiner:
Attorney: Kallman; Nathan N.