Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1982-05-07
1984-11-20
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307511, 307517, 328 72, 328120, 328133, H03K 5135, H03K 526
Patent
active
044841426
ABSTRACT:
The present invention includes a first input signal circuit to receive pulse signals from a voltage-controlled oscillator (VCO), or some other controllable pulse signal source, and a second input signal circuit to receive pulse signals from a magnetic recording medium, or some pulse signal source, with which the voltage controlled oscillator is to be put in phase synchronization. A correction signal generator circuit is connected to both the input signal circuits to provide a first correction signal in response to a pulse signal from the recording medium and to provide a second correction signal in response to a pulse signal from the VCO. There is a third circuit which monitors how long a correction signal is in effect and if such a correction signal is present for longer than a predetermined time, the third circuit terminates the correction signal to enable a new correction signal to be generated in response to the next one of said input signals to arrive. Finally, there is a fourth circuit which is connected to the correction circuitry to permit it, in a first mode of operation, to be enabled at all times to phase correct the controllable pulse signal source in response to a predetermined pattern of signals from the recording medium and to permit it, in a second mode of operation, to be available only during "window" periods initiated by pulse signals from the recording medium.
REFERENCES:
patent: 3588710 (1971-06-01), Masters
patent: 3599102 (1971-08-01), Mous
patent: 3735324 (1973-05-01), Phillips
patent: 3755746 (1973-08-01), Hogue et al.
Field Norman A.
Rub Bernardo
Cefalo Albert
Digital Equipment Corp.
Heyman John S.
Pitruzzella Vincenzo
Reiling Ronald
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