Reference voltage generator

Details Reference voltage generator Reference voltage generator

1990-10-01

1991-09-03

Stephan, Steven L.

Electricity: power supply or regulation systems

Self-regulating

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

323314, 3072961, 3072968, 36518909, G05F 324

Patent

active

050457721

ABSTRACT:
A circuit and method for generating a reference voltage which decreases as a supply voltage increases, and increases as the supply voltage decreases are provided. The circuit includes a voltage divider connected to the input of an inverting amplifier whose output is connected to a level shifter/buffer. Increases in the supply voltage cause the output voltage of the voltage divider and hence the input voltage of the inverting amplifier to increase. Over the operating range, the combined effect of the increasing input and supply voltage cause the output voltage of the inverting amplifier to decrease. Similarly, over the operating range, a decrease in supply voltage causes an increase in output voltage from the inverting amplifier. This output voltage is shifted to a level more convenient for the user by the level shifter/buffer. The buffer also increases the amount of output current that can be supplied by the reference voltage generator.

REFERENCES:
patent: 4375596 (1983-03-01), Hoshi
patent: 4713600 (1987-12-01), Tsugaru et al.
patent: 4873458 (1989-10-01), Yoshida

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