Current-pulse integrating circuit and phase-locked loop

Details Current-pulse integrating circuit and phase-locked loop Current-pulse integrating circuit and phase-locked loop

1990-02-26

1992-03-03

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328155, 307262, H03K 500, H03K 513

Patent

active

050936280

ABSTRACT:
Circuitry and method for integrating current pulses, the circuitry including an integration amplifier having an integration capacitor located in its feedback loop. The current pulse integrator also includes three current sources and four current switches. A first current switch is located between the first current source and a second current source. A second current switch is located between the output of the integration amplifier and the second current source. A third current switch has one end connected to the first current source and the input to the integration amplifier, and the other end connected to the third current source. A fourth current switch is connected between the output of the integration amplifier and the third current source. Current passes through the integration capacitor in a first direction to charge the integration capacitor during a charge state of operation of the current pulse integrator. Current is prevented from passing through the integration capacitor in the first direction during at least one other state of operation of the current pulse integrator. An output current from the integration amplifier during the charge state of operation is substantially equal to an output current from the integration amplifier during the other state or states of operation.

REFERENCES:
patent: 3988595 (1976-10-01), Eatock
patent: 4114050 (1978-09-01), Lerche
patent: 4122528 (1978-10-01), Rieger
patent: 4918338 (1990-04-01), Wang

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