Amplifier

Details Amplifier Amplifier

1998-02-24

1999-06-29

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

330257, H03F 304

Patent

active

059173815

ABSTRACT:
In an amplifier, a first transistor of npn type has its base connected to an input terminal, a second transistor of pnp type has its base connected to the base of the first transistor, and a third transistor of pnp type has its base connected to the base of the first transistor. A current mirror circuit doubles the collector current of the second transistor so that the doubled current is used as the emitter current of the third transistor. The base currents of the first and second transistors are supplied by the base current of the third transistor.

REFERENCES:
patent: 4492824 (1985-01-01), Bell et al.
patent: 4786855 (1988-11-01), O'Neill et al.
patent: 5276405 (1994-01-01), Mazzucco et al.
patent: 5570008 (1996-10-01), Goetz

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