Transconductance filter circuit

Details Transconductance filter circuit Transconductance filter circuit

2006-09-26

2006-09-26

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S554000

Reexamination Certificate

active

07113029

ABSTRACT:
Transconductance filter circuits. A transconductor includes two inputs for receiving two differential voltages, and a first output terminal and a second output terminal for outputting two differential signals. A first capacitor array includes at least one first switch capacitor unit controlled by a first signal, and a first equivalent capacitor coupled between the first output terminal and the second output terminal when the first signal is enabled. two second capacitor arrays each includes at least one second switch capacitor unit controlled by a second signal, two second equivalent capacitors respectively coupled between the first output terminal and a ground level, and between the second output terminal and the ground level when the second signal is enabled. The capacitance of the first equivalent capacitor exceeds that of the two second equivalent capacitors connected in serial.

REFERENCES:
patent: 5726600 (1998-03-01), Raghavan et al.
patent: 6400932 (2002-06-01), Oh et al.

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