High frequency line ripple cancellation circuit

Details High frequency line ripple cancellation circuit High frequency line ripple cancellation circuit

1981-04-27

1982-07-27

Pellinen, A. D.

Electricity: power supply or regulation systems

Input level responsive

Using a linearly acting final control device

323273, 363 46, G05F 156

Patent

active

043419909

ABSTRACT:
In circuits such as voltage regulators and the like where parasitic currents may be generated as a result of high frequency ripple on the supply line, means are provided to cancel the effects of the parasitic current. A capacitor having a capacitance substantially equal to the parasitic capacitance is adapted to receive the supply voltage excursions and generate a current substantially equal to the parasitic current. A current mirror circuit or the like is employed to either divert this second current from the base of the output transistors or to reduce the drive current to the base of the output transistors by an amount equal to the second current.

REFERENCES:
patent: 3222538 (1965-12-01), Manners et al.
patent: 3600663 (1971-08-01), Wagner
patent: 3735240 (1973-05-01), Davis et al.
patent: 3946303 (1976-03-01), Streit et al.
Maillet, "Slew Rate Improving Circuit for a Voltage Comparator", IBM Technical Disclosure Bulletin, vol. 19, No., 12, May 1977, pp. 4636, 4637.
Santamaria et al., "High Stability Variable Voltage Source", Electronic Engineering, vol. 50, No. 615, Nov. 1978, p. 34, S9039 0062.

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