Variable impedance circuit, variable gain differential...

Details Variable impedance circuit, variable gain differential... Variable impedance circuit, variable gain differential...

2007-05-08

2007-05-08

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S278000, C327S359000, C327S356000

Reexamination Certificate

active

10802878

ABSTRACT:
The collectors of transistors are connected via respective resistances to a power supply terminal receiving a power supply voltage. The emitters of the transistors are connected to a ground terminal via respective resistances. A shunt resistance, a FET, and a shunt resistance are connected in series between nodes connected to the respective emitters of the transistors. The gate of the FET is connected via a resistance to a control terminal receiving a control voltage. The shunt resistances and FET form a variable resistance circuit.

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