Matching current source

Details Matching current source Matching current source

1986-11-20

1987-11-10

Salce, Patrick R.

Electricity: power supply or regulation systems

Self-regulating

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

323317, G05F 320

Patent

active

047060131

ABSTRACT:
In a matching current source for providing equivalent sink and source current, external voltage controls the amplitude of sink current and an operational amplifier is connected to mirror the sink current to the source current. The operational amplifier comprises a unity gain feedback loop for eliminating the effect of the channel length modulation effect in MOS transistors and the Early Effect in bipolar transistors, and serves the function of generating equivalent sink and source currents.

REFERENCES:
patent: 4185236 (1980-01-01), van de Plassche et al.
patent: 4186437 (1980-01-01), Cuk

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