Micropower regulator

Details Micropower regulator Micropower regulator

1993-07-30

1995-07-25

Dougherty, Thomas M.

Electricity: power supply or regulation systems

Output level responsive

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

323223, G05F 146

Patent

active

054365511

ABSTRACT:
A rectifier-capacitor power supply has source terminals across which is connected the series combination of a voltage dropping resistor and a transistor circuit comprising (a) an NPN resistor connected in a common emitter configuration and having its collector connected by a load resistor to the voltage dropping resistor, and (b) a PNP transistor connected in a common collector configuration across the series combination of the NPN transistor and its load transistor. A pair of output terminals for a load are connected to opposite ends of that last named series combination. Also connected between those opposite ends is a voltage divider circuit consisting of two resistors in series and having a junction directly connected to the base of the NPN transistor. The circuitry described above as present between such source terminals and output terminals serves to keep substantially constant the voltage across such output terminals despite impedance in a load connected thereto or variations in the voltage across the source terminals.

REFERENCES:
patent: 3761801 (1973-09-01), Sheng
patent: 4500880 (1985-02-01), Gomersall et al.
patent: 4716359 (1987-12-01), Numata et al.
patent: 4937586 (1990-06-01), Stevens et al.
patent: 5003454 (1991-03-01), Bruning
Electronics, vol. 52 No. 8 Kelvin Shih, Micropower regulator has low dropout voltage Apr. 12, 1979.
Headquarters, Dept. of the Army, Washington DC, Technical Manual, TM 11-690, pp. 1, 98 and 99, dated Mar. 17, 1959, "Basic Theory and Application of Transistors".
Motorola Publication, "Linear And Interface Integrated Circuits", Series G, Printing 1990, p. 1/Introduction; pp. 5-4 and 5-6.
Motorola Publication, "Small-Signal Transistors, FETs And Diodes", Printing 1991, p. 1/Introduction; pp. 3-29, 3-88 and 3-89.

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