Bias current compensating circuit, particularly for saw-tooth wa

Details Bias current compensating circuit, particularly for saw-tooth wa Bias current compensating circuit, particularly for saw-tooth wa

1987-06-01

1989-02-07

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307263, 307246, 328183, 328185, 323315, 323317, H03K 408, H03K 1756, H03K 410, G05F 316

Patent

active

048033812

ABSTRACT:
This circuit comprises a current source stage connectable to a capacitor which is controlled so as to alternately and periodically charge with the current fed by the source stage and discharge through a switch element, so as to generate a saw-tooth wave voltage. A buffer circuit, with low-impedance output is connected to the capacitor, for feeding a saw-tooth shaped low-impedance voltage signal to a load. In order to prevent the bias current of the buffer stage from introducing an error in the capacitor charge current and in the frequency of the saw-tooth voltage, a current sensor is provided connected between the buffer stage and the current source stage so as to vary the current generated by the source stage in an equal but opposite manner with respect to the error current due to the buffer stage.

REFERENCES:
patent: 4009398 (1977-02-01), Yamada et al.
patent: 4047052 (1977-09-01), Koubek et al.
patent: 4626702 (1986-12-01), Chito

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