Resistor network for programmable transconductance stage

Details Resistor network for programmable transconductance stage Resistor network for programmable transconductance stage

2008-12-18

2010-11-30

Mottola, Steven J (Department: 2817)

Amplifiers

Signal feedback

Variable impedance in feedback path varied by separate...

C330S144000

Reexamination Certificate

active

07843261

ABSTRACT:
A voltage-to-current converter is provided. The voltage-to-current converter comprises an amplifier, a resistor network, an R-2R network, and switches. The amplifier has a first input node (which is an input signal), a second input node, and an output node. The resistor network is coupled to the output node of the amplifier, includes a plurality of resistors coupled in series with on another, and includes a plurality of first tap nodes. The R-2R network is coupled to the resistor network and includes a plurality of second tap nodes. Additionally, at least one switch is coupled between the second input node of the amplifier and each first tap node, and at least one switch is coupled between the second input node of the amplifier and each of the second tap nodes.

REFERENCES:
patent: 5808576 (1998-09-01), Chloupek et al.
patent: 6693491 (2004-02-01), Delano
patent: 7162029 (2007-01-01), Soman et al.
Deutsches Patent und Markenamt, Office Action issued regarding German Patent Application DE 10 2008 005 312.0 dated Oct. 16, 2008.

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