Current amplifier

Amplifiers – With semiconductor amplifying device – Including current mirror amplifier

Patent

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Details

330308, H03F 308

Patent

active

058670661

ABSTRACT:
A current amplifier includes a cascode transistor for fixing the voltage of an input of the amplifier; a first constant current source connected between the input and a first supply voltage; a second constant current source, for providing a current lower than the first current source, connected between a second supply voltage and the cascode transistor; a second transistor, of different type than the cascode transistor, connected between the input and the second supply voltage, and controlled by the node between the cascode transistor and the second current source; and an output transistor of same type as the second transistor, connected to the second supply voltage and controlled by the node.

REFERENCES:
patent: 3801933 (1974-04-01), Teare
patent: 4507573 (1985-03-01), Nagano
patent: 4855618 (1989-08-01), Brokaw
patent: 5079518 (1992-01-01), Wakayama
patent: 5216386 (1993-06-01), Wyatt
patent: 5254957 (1993-10-01), Lauffenburger

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