Differential amplifier having single phase input and two output

Details Differential amplifier having single phase input and two output Differential amplifier having single phase input and two output

1995-05-26

1996-08-27

Mottola, Steven J.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, 330301, H03F 345

Patent

active

055505112

ABSTRACT:
A differential amplifier includes switching FETs provided at an input side and at a reference side, respectively, forming a differential pair; an FET serving as a constant current source for providing a current flow equal to a sum of the currents flowing through the respective switching FETS; and an inductor connected in series to the FET serving as a constant current source between the connection node of both switching FETs and the power supply of the amplifier. The inductor is not a load with respect to DC and any fluctuation of the signal current flowing through the FET serving as a constant current source is small so that any difference between the output voltages at two different phase outputs is reduced.

REFERENCES:
patent: 4968904 (1990-11-01), Yamashita et al.
patent: 5068621 (1991-11-01), Hayward et al.
patent: 5473529 (1995-12-01), Bohme

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