Reference voltage generating circuit

Details Reference voltage generating circuit Reference voltage generating circuit

1996-06-24

1998-08-25

Berhane, Adolf

Electricity: power supply or regulation systems

Self-regulating

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

323315, G05F 324

Patent

active

057986371

ABSTRACT:
A reference voltage generating circuit of a semiconductor device includes a start-up circuit connected to a reference current generator, a substrate variation sensor and a temperature compensation current- to-voltage converter receiving outputs from the generator and sensor. The start-up circuit is connected to a reset terminal, for generating a driving signal determining an operating point of the reference voltage generating circuit. The reference current generator has a current mirror of a constant current source for receiving the driving signal from the start-up circuit and generating a reference current. The reference current generator includes a voltage divider for determining the reference current. The substrate voltage variation sensor compensates for a variation of the reference current caused by the variation of a substrate voltage. The current-to-voltage converter converts the reference current to a reference voltage; and the temperature compensator connected to the output terminal, compensates for the variation of the reference current due to the variation of temperature.

REFERENCES:
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patent: 5109187 (1992-04-01), Gulliani
patent: 5212440 (1993-05-01), Waller
patent: 5481180 (1996-01-01), Ryat

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