Constant voltage source circuit

Details Constant voltage source circuit Constant voltage source circuit

G - Physics

05

F

323/4

G05F 1/56 (2006.01) G05F 1/565 (2006.01) H03F 1/30 (2006.01)

Patent

CA 1306006

CONSTANT VOLTAGE SOURCE CIRCUIT ABSTRACT OF THE DISCLOSURE A constant voltage source circuit which is provided with an output transistor (Q1) for outputting a predetermined output voltage (V0) in accordance with an input voltage (VIN) and a differential amplifier (A) and is further characterized in that the circuit further comprises a reference voltage control means which monitors variations of the input voltage (VIN) and outputs a predetermined constant voltage to the differential amplifier (A) as a reference voltage when the input voltage (VIN) is higher than, a predetermined voltage level, and a voltage varied in accordance with the variation of the input voltage (VIN) is output therefrom to the differential amplifier (A) as a reference voltage when the input voltage (VIN) falls below a predetermined voltage level.

604749

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