Constant current circuit

Details Constant current circuit Constant current circuit

2011-07-05

2011-07-05

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

Reexamination Certificate

active

07973525

ABSTRACT:
Provided is a constant current circuit capable of supplying a stable constant current. Even when K values of NMOS transistors vary due to manufacturing fluctuations in semiconductor devices, a voltage generated across a resistor is always a threshold voltage difference between the NMOS transistors, and thus hardly varies. Even when the K values of the NMOS transistors vary due to a change in temperature, the voltage generated across the resistor is always the threshold voltage difference between the NMOS transistors, and thus hardly varies.

REFERENCES:
patent: 5180967 (1993-01-01), Yamazaki
patent: 3-238513 (1991-10-01), None
patent: 6-152272 (1994-05-01), None

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