Voltage control circuit for a semiconductor apparatus capable of

Details Voltage control circuit for a semiconductor apparatus capable of Voltage control circuit for a semiconductor apparatus capable of

1991-01-18

1992-01-21

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307242, 307571, 323303, H03K 301

Patent

active

050830430

ABSTRACT:
There is disclosed a voltage control circuit for a semiconductor apparatus for controlling an output voltage to be applied from an external voltage source to a load circuit of the semiconductor apparatus therethrough. A reference voltage generator generates a predetermined reference voltage according to a source voltage outputted from an external voltage source, and an error amplifier compares the output voltage with the reference voltage, and outputs a comparison signal for representing the comparison result thereof. A voltage controller controls the output voltage according to the comparison signal. Further, a diode circuit which is connected in parallel with the voltage controller applies the source voltage to the load circuit in a forward direction thereof. Furthermore, a first switching device enables the reference voltage generator, the error amplifier and the voltage controlled in response to a first control signal outputted from an external circuit, and for disabling the reference voltage generator, the error amplifier and the voltage controller in response to a second control signal outputted from the external circuit. Also, a second switching device enables the diode circuit in response to the second control signal, and for disabling the diode circuit in response to the first control signal.

REFERENCES:
patent: 4017779 (1977-04-01), McDonald et al.
patent: 4652808 (1987-03-01), Mostyn et al.
patent: 4779037 (1988-10-01), Lo Cascio
patent: 4906913 (1990-03-01), Stanojevic

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