Transistor circuit

Details Transistor circuit Transistor circuit

1994-09-26

1995-11-21

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

363 73, G05F 316

Patent

active

054690471

ABSTRACT:
In order to obtain a constant current circuit which has an excellent constant current property and requires no plural bias circuits, a base of an NPN bipolar transistor (5) and a gate of an N-channel MOS transistor (6) are connected to a first terminal (1) in common. A collector of the transistor (5) is connected to a second terminal (2) and a source of a transistor (6) is connected to a third terminal respectively, while a voltage source (59) is connected between the first and third terminals. An emitter of the transistor (5) is connected with a drain of the transistor (6). Identical bias voltages are supplied to the base and the gate, while a gate-to-drain voltage of the transistor (6) is equal to a base-to-emitter voltage of the transistor (5). Thus, the transistor (6) operates in a pentode region, to serve as a constant current load for the transistor (5).

REFERENCES:
patent: 4052626 (1977-10-01), Tuma et al.
patent: 4081758 (1978-03-01), Steckler
patent: 4538076 (1985-08-01), Shimada
patent: 4645957 (1987-02-01), Baliga
patent: 4945266 (1990-07-01), Mori
patent: 5055716 (1991-10-01), El Gamel
"Analog MOS Integrated Circuits for signal processing", Roubik Gregorian, Gaborc. Temes; Jhon Wiley & Sons, 1986 pp. 126-132.
"Analysis and Design of Analog Integrated Circuits", second edition Paul R. Gray, Robert G. Meyer pp. 233-246, pp. 709-718.

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