Transconductance-adjusting circuit

Details Transconductance-adjusting circuit Transconductance-adjusting circuit

2006-06-13

2006-06-13

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

Reexamination Certificate

active

07061309

ABSTRACT:
A transconductance-adjusting circuit includes a first VI converting circuit for converting a first reference voltage which is input to a current; a resistor for producing a voltage from the current output from the first VI converting circuit; a second VI converting circuit for outputting a current corresponding to a potential difference between the voltage produced by the resistor and a second reference voltage; an IV converting circuit for converting the current output from the second VI converting circuit to a voltage; and a feedback unit for changing operating points of an input circuit for inputting the first reference voltage of the first VI converting circuit by the voltage output from the IV converting circuit so that the potential difference is 0. The voltage output from the IV converting circuit is provided to a bias source for an input differential pair in a primary RC filter.

REFERENCES:
patent: 6326838 (2001-12-01), Kimura et al.
patent: 6538498 (2003-03-01), Lee et al.
patent: 6838929 (2005-01-01), Mitteregger
patent: 6930565 (2005-08-01), Vishinsky

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