DC amplifier

Details DC amplifier DC amplifier

1989-04-14

1990-05-22

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330311, H03F 345

Patent

active

049280732

ABSTRACT:
A DC amplifier includes first and second transistors, an emitter resistor, and a load resistor. The first and second transistors constitute a differential amplification transistor pair. The emitter resistor is connected between the emitters of the first and second transistors. The load resistor is connected between the collectors of the transistors. The resistance of the load resistor is set to be 1/2 that of the emitter resistor. The emitters of third and fourth transistors equivalent to the first and second transistors are series-connected to the collectors of the first and second transistors through the load resistor. The biases of the third and fourth transistors are set to be close to those of the first and second transistors.

REFERENCES:
patent: 4605906 (1986-08-01), Miller

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