Constant voltage generator for generating a constant voltage hav

Details Constant voltage generator for generating a constant voltage hav Constant voltage generator for generating a constant voltage hav

1978-12-19

1981-03-24

Larkins, William D.

Electricity: power supply or regulation systems

Self-regulating

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

357 13, 357 28, 357 51, 323907, H01L 2704, H01L 2990

Patent

active

042583110

ABSTRACT:
A constant voltage generator capable of generating a constant voltage having a fixed temperature coefficient regardless of manufacturing errors is disclosed. The constant voltage generator comprises a transistor construction having a forwardly biased PN-junction, a Zener diode connected in series to an electrical path between the emitter and a collector of the transistor construction, a first resistor connected between a base and the emitter of the transistor construction, and a second resistor connected between the base and the collector of the transistor construction. The transistor construction, the Zener diode and the first and second resistors are all formed in a common semiconductor substrate, the first resistor being composed of a region of one conductivity type and the second resistor being composed of a pinch resistor formed in the substrate. The transistor and Zener diode may be composed of a first semiconductor region of one conductivity type, a second region of the other conductivity type formed in the first semiconductor region and a third region of the one conductivity type being formed in the second region. The first region may be composed of a fourth region of the other conductivity type formed in the first semiconductor region, and the second resistor may be composed of a fifth region of the other conductivity type formed in the first semiconductor region and operable as a resistive region and a sixth region of the one conductivity type covering a part of the fifth region.

REFERENCES:
patent: 3465213 (1969-09-01), Hugle
patent: 3567965 (1971-03-01), Weinerth et al.
Berger et al., "Superintegrated Voltage Clamp", IEEE J. of Solid State Circuits, vol. SC8, No. 3, Jun. 1973, pp. 231-232.

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