Electricity: power supply or regulation systems – Remote sensing
Patent
1974-04-18
1976-03-23
Pellinen, A. D.
Electricity: power supply or regulation systems
Remote sensing
323 1, G05F 156
Patent
active
039463036
ABSTRACT:
A voltage regulator of the type suitable for production as a monolithic integrated circuit for use with a separate reference voltage source is composed of a differential amplifier having a so-called current mirror circuit coupling its outputs, followed by a current amplifying circuit from the output of which a feedback voltage obtained from a resistive divider is brought back to one input of the differential amplifier, the other input thereof being for connection to the reference voltage source. Stabilization of the regulator is obtained by connecting a small capacitance, of a magnitude suitable for provision as an element of a monolithic integrated circuit, between one of the poles of the supply voltage and the point of connection between the differential amplifier and the current amplifier circuit. The differential amplifier has a current source between common emitter connection and ground. The stability condition is worked out showing that the sum current of the differential amplifier must be unusually small. When a multi-transistor current amplifier is used, a second small capacitance is connected in to improve performance. The capacitances may be base-collector diodes, base-emitter diodes, MOS elements, or the like.
REFERENCES:
patent: 3555402 (1971-01-01), Bozarth et al.
patent: 3588672 (1971-06-01), Wilson
patent: 3649926 (1972-03-01), Hill
patent: 3714600 (1973-01-01), Kuijk et al.
patent: 3761787 (1973-09-01), Davis et al.
patent: 3781699 (1973-12-01), Sakamoto
patent: 3786344 (1974-01-01), Davis et al.
patent: 3792365 (1974-02-01), Ellbogen
patent: 3840819 (1974-10-01), Steckler
Staiger Karl
Streit Klaus
Pellinen A. D.
Robert & Bosch GmbH
Woodward William R.
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