Signal acquisition circuit with variable bandwidth phase locked

Details Signal acquisition circuit with variable bandwidth phase locked Signal acquisition circuit with variable bandwidth phase locked

1978-04-05

1988-02-09

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Return signal controls radar system

Receiver

342103, 342 62, G01S 1366

Patent

active

047244372

ABSTRACT:
A signal acquisition circuit for a missile guidance system has a phase lock loop which is responsive to incoming signals received from a target and will lock on to the frequency of the received signal. The bandwidth of the phase lock loop is altered in dependence on the signal being received in order to distinguish between a valid target and noise.

REFERENCES:
patent: 3242487 (1966-03-01), Hammack
patent: 3721977 (1973-03-01), Darboven
patent: 3885238 (1975-05-01), Klein et al.
patent: 3893113 (1975-07-01), Iten et al.
patent: 3938148 (1976-02-01), Hobson
patent: 3949955 (1976-04-01), Sykes et al.
patent: 3953849 (1976-04-01), Couvillon
patent: 4052722 (1977-10-01), Millard
RCA COS/MOS Integrated Circuits, Spec. Sheet for CD4046 Phase-Locked Loop, pp. 150-153, 1977.

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