Differential amplifier circuit

Details Differential amplifier circuit Differential amplifier circuit

1980-07-24

1983-04-05

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, 330261, H03F 345

Patent

active

043792685

ABSTRACT:
A differential amplifier circuit having constant mutual conductance characteristics. The circuit comprises first and second differential amplifier units in which each of the emitters of two transistors are connected to a common constant current source via respective diode-junction stacks or resistors. The bases of the individual transistors in the first amplifier unit are connected to different ones of the transistors in the second amplifier unit. On the other hand, the collectors of the individual transistors of the first unit are connected to different ones of the collectors of the second unit, wherein the bases are not connected to each other. Further, the diode-junction stacks or the resistors in the same amplifier unit have the same numbers of diodes or the same resistance, but differ between the amplifier units.

REFERENCES:
patent: 4197505 (1980-04-01), Nishijima et al.
patent: 4241315 (1980-12-01), Patterson et al.

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