Bandgap reference circuit with improved output reference voltage

Details Bandgap reference circuit with improved output reference voltage Bandgap reference circuit with improved output reference voltage

1989-06-30

1990-01-23

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323316, 3072967, 330257, G05F 328

Patent

active

048960942

ABSTRACT:
A bandgap reference circuit providing a continuous output reference voltage. The bandgap reference circuit comprises an operational amplifier, an output circuit, and a compensation circuit. The operational amplifier receives a first input signal and a second input signal and provides an output signal in response to a difference in voltage between the first input signal and the second input signal. The output circuit receives the output of the operational amplifier and provides an output reference voltage. The output circuit provides the first input signal and the second input signal to the operational amplifier in such a way as to maintain the output reference voltage at a substantially constant value. The compensation circuit provides a current to the output circuit to compensate for currents conducted from the bases of transistors in an input stage of the operational amplifier, thereby making the output reference voltage more stable.

REFERENCES:
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patent: 4506208 (1985-03-01), Nagano
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Ainsworth et al., "Compensated Voltage Regulator", IBM Technical Disclosure Bulletin, vol. 15, No. 4, Sep. 1972, pp. 1141-1142.
A Programmable CMOS Dual Channel Interface Processor for Telecommunications Applications-Bhupendrak, Ahuja, Paul R. Gray, Wayne M. Baxter, Gregory T. Uehara-IEEE Journal of Solid State Circuits, vol. SC-19, No. 6, Dec. 1984, pp. 892-899.
CMOS Voltage References Using Lateral Bipolar Transistors-Marc G. R. Degrauwe, Oskar N. Leuthold, Eric A. Vittoz, Henri J. Oguey, Arthur Descombes:-IEEE Journal of Solid State Circuits, vol. SC-20, No. 6, Dec. 1985-pp. 1151-1157.

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