Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1985-04-12
1987-01-27
Grimm, Siegfried H.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307526, 328155, 331 27, H03D 1300
Patent
active
046396802
ABSTRACT:
A digital signal detector utilizing a detected input digital signal derived from a reference square wave and a received pulse train to establish phase and frequency variations between the reference signal and the received signal. The detected signal and the reference signal are coupled to up-down counters wherein overflow counts from preset values are obtained which are representative of the frequency and phase difference between the reference and received signals. These overflow counts are utilized to establish phase and frequency error correction signals which may be coupled to control the reference oscillator to provide frequency and phase lock between the reference and received signals.
REFERENCES:
patent: 4276512 (1981-06-01), Wittke
patent: 4316152 (1982-02-01), Meyer
Grimm Siegfried H.
Levine Seymour
Sperry Corporation
Terry Howard P.
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