Variable impedance circuit and apparatus comprising said...

Details Variable impedance circuit and apparatus comprising said... Variable impedance circuit and apparatus comprising said...

2008-05-13

2008-05-13

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C333S08100R

Reexamination Certificate

active

11485630

ABSTRACT:
A variable impedance circuit includes at least one fixed resistance and a plurality of transistors between a first and a second terminal. The transistors belonging to the plurality of transistors are arranged parallel to one another and parallel to the resistance and are controllable by a plurality of control signals different from one another and configured in such a way as to obtain a total impedance between said first and second terminals that is substantially variable in a continuous manner.

REFERENCES:
patent: 6006169 (1999-12-01), Sandhu et al.
patent: 6448815 (2002-09-01), Talbot et al.
patent: 6545560 (2003-04-01), Thompson et al.
patent: 03/021777 (2003-03-01), None

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