Charge amplifier circuit with drift compensation

Details Charge amplifier circuit with drift compensation Charge amplifier circuit with drift compensation

1989-01-25

1990-10-09

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307353, 330 9, 328151, H03F 130, H03F 102

Patent

active

049623281

ABSTRACT:
A charge amplifier circuit for balancing drift between periodically occurring measured signals includes a drift-compensating device with a sample/hold unit which is triggered by a trigger device in accordance with the period of the measured signals. The trigger device is connected for supplying trigger pulses, so that the drift at an output of the charge amplifier, determined at the end of a compensation period, can be taken into account by the sample/hold unit to supply a compensating current to an input of the charge amplifier. The triggering of the sample/hold unit can be performed by external or internal triggering arrangements, so that simple measurements can be undertaken without a large outlay of equipment.

REFERENCES:
patent: 3978399 (1976-08-01), Chadbourne
patent: 4163947 (1979-08-01), Weedon
patent: 4211981 (1980-07-01), Lerma
patent: 4430622 (1984-02-01), Simoes

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