Reference voltage circuit

Details Reference voltage circuit Reference voltage circuit

1987-02-11

1988-02-16

Salce, Patrick R.

Electricity: power supply or regulation systems

Self-regulating

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

323316, G05F 320

Patent

active

047257709

ABSTRACT:
A reference voltage circuit in which an output reference voltage is stabilized against variations in power source as well as in transistor current amplification factor h.sub.FE. In a reference voltage circuit comprising a DC power source connected to an output terminal, first and second resistors with their respective one ends commonly connected to the output terminal, a first NPN transistor with its collector shorted with its base and connected to the other end of the first resistor and its emitter grounded, a second NPN transistor with its collector connected to the other end of the second resistor and its base connected to the collector of the first NPN transistor, a third resistor connected between the emitter of the second NPN transistor and the ground, and a third NPN transistor with its collector connected to the output terminal, its base connected to the collector of the second NPN transistor and its emitter grounded, there are further provided a fourth resistor connected between the collector of the third NPN transistor and the output terminal and a PNP transistor with its base connected to the collector of the third NPN transistor, its emitter connected to the output terminal and its collector grounded.

REFERENCES:
patent: 4570114 (1986-02-01), Heim
patent: 4675592 (1987-06-01), Tsuzuki

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