Voltage stabilizing circuit of switching power supply circuit

Details Voltage stabilizing circuit of switching power supply circuit Voltage stabilizing circuit of switching power supply circuit

1992-09-23

1994-08-09

Stephan, Steven L.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323351, G05F 156

Patent

active

053369874

ABSTRACT:
A voltage stabilizing circuit comprising a voltage detecting circuit for detecting a control voltage in response to an output voltage of the voltage stabilizing circuit, and a control circuit for stabilizing, based on the control voltage, the output voltage of the electronic device. To remove the component of a base-emitter voltage from the control voltage, the voltage detecting circuit includes a first series circuit and a second series circuit connected to each other in series. The first series circuit consists of a first resistor and a first transistor connected in series. The second series circuit consists of a second resistor and a second transistor connected in series. The second transistor is connected to function as a diode connection. The first resistor and the second resistor have substantially the same resistances. Thus the control voltage is made to be substantially the same as the output voltage.

REFERENCES:
patent: 4112764 (1978-09-01), Turner
patent: 4857769 (1989-08-01), Kotera et al.
patent: 4998177 (1991-03-01), Takizawa et al.
patent: 5175487 (1992-12-01), Inoue
patent: 5217296 (1993-06-01), Tanner et al.

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