Filter circuit with negative transconductance

Details Filter circuit with negative transconductance Filter circuit with negative transconductance

2004-03-05

2009-10-27

Maung, Nay A (Department: 2618)

Telecommunications

Transmitter and receiver at same station

C455S232100, C455S307000, C327S552000, C327S556000, C330S303000

Reexamination Certificate

active

07610022

ABSTRACT:
Apparatus, systems, and methods implementing techniques for filtering signals are described. A filter circuit receives an input signal and produces a corresponding filtered signal. The filter circuit has a transfer function that relates the filtered signal to the input signal. The transfer function includes at least one pole and at least one zero, where at least one of the zeros corresponds to a first frequency, and at least one of the poles corresponds to a second frequency. The apparatus also includes a negative-transconductance circuit that is coupled to the filter circuit and that increases a magnitude of a component of the filtered signal that corresponds to the second frequency.

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