Low-voltage precision current generator

Details Low-voltage precision current generator Low-voltage precision current generator

1991-07-01

1992-06-23

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323314, 3072968, 330288, G05F 324, G05F 328

Patent

active

051246325

ABSTRACT:
A low voltage precision current generator includes an amplifier, a first transistor, a current portion, and an output portion. The amplifier has first and second input terminals and changes an output voltage until voltages at the first and second input terminals are equal. An input voltage which may be a stable reference voltage or a variable voltage is received at the first input terminal. The second input terminal is connected to the current portion in order to provide a reference current proportional to a voltage difference between the voltage at the second input terminal and a power supply voltage. The amplifier controls the conductivity of the first transistor in order to regulate the voltage at its second input terminal. A precision current precision current proportional to the reference current is then provided.

REFERENCES:
patent: 4629913 (1986-12-01), Lechner
patent: 4697154 (1987-09-01), Kousaka et al.
patent: 4700144 (1987-10-01), Thomson
patent: 4931676 (1990-06-01), Baiocchi et al.
patent: 4965510 (1990-10-01), Kriedt et al.
patent: 5061862 (1991-10-01), Tamagawa
Gregorian, R. and Temes, G. C., Analog MOS Integrated Circuits for Signal Processors, John Wiley & Sons, New York, 1986, p. 450.

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