DC-DC impedance transformer charge pump

Details DC-DC impedance transformer charge pump DC-DC impedance transformer charge pump

1987-02-17

1988-05-17

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307320, 328151, G11C 2702

Patent

active

047453036

ABSTRACT:
A circuit is disclosed that includes a pair of varactors coupled to an input sample circuit and having an appropriate capacitance during the sample strobe of the input to minimize sampling errors. The varactors are combined with a control switch having an output timed to symmetrically reduce the capacitance to a new value, preferably a value approaching the input capacitance of a field effect transistor which is included in the output circuit. In this way, a noise-free voltage and power gain of CT0/CT1 can be reached, where CT0 is the initial value of the capacitance of the sampling circuit and CT1 is the final value of the capacitance of the sampling circuit.

REFERENCES:
patent: 3325654 (1967-06-01), Mrazek
patent: 3659117 (1972-04-01), Caveney et al.
patent: 3753132 (1973-08-01), Hill

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