Device for generating intermediate voltages

Details Device for generating intermediate voltages Device for generating intermediate voltages

1995-04-27

1997-02-18

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323314, 327535, 327333, G05F 316

Patent

active

056044283

ABSTRACT:
An apparatus for generating an intermediate voltage having a value between a positive voltage supply value and a negative supply value. The apparatus has low power dissipation and is dynamically stable over a range of external supply voltages. The apparatus comprises a voltage comparator having first and second input terminals and a control signal output terminal. A reference voltage generator is coupled to the positive voltage supply and generates a reference voltage which is coupled to the first input terminal of the comparator. A device having a zener characteristic is coupled to the positive voltage supply and generates a voltage which is coupled to the second input terminal of the comparator. A current source is coupled to the negative voltage supply and generates a current which is coupled to a terminal, to form the intermediate voltage, and is also coupled to the device to determine the voltage generated thereby. The voltage and the reference voltage are compared in the comparator which generates a control signal proportional to a difference therebetween which is coupled to control the current source.

REFERENCES:
patent: 3754787 (1973-08-01), Kreitz et al.
patent: 3887863 (1975-06-01), Brokaw
patent: 4099775 (1978-07-01), Watanabe
patent: 4774452 (1988-09-01), Ahmed
patent: 5013996 (1991-05-01), Conzelmann et al.

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