Amplifier circuit

Details Amplifier circuit Amplifier circuit

1997-08-27

1999-10-05

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

330290, 330288, H03F 304, H03F 130

Patent

active

059630965

ABSTRACT:
An amplifier circuit can operate stably without increasing a consumed current even when a direct current amplification of a transistor is fluctuated due to tolerance in manufacturing process. The amplifier circuit has a first transistor having an emitter grounded. A second transistor has an emitter connected to a collector of said first transistor and a collector connected to a power source via a load and a first bias resistor circuit network. A third transistor constructs a current mirror circuit together with said first transistor and receives a bias current via a second bias resistor circuit network. The second bias resistor circuit network has a power source side terminal connected to a junction point between said load and said first bias resistor circuit network.

REFERENCES:
patent: 4663599 (1987-05-01), Patch

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