Circuit arrangement to compensate non-linearities in a resistor,

Details Circuit arrangement to compensate non-linearities in a resistor, Circuit arrangement to compensate non-linearities in a resistor,

1998-08-31

2000-12-26

Kim, Jung Ho

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

338 20, 338325, H03L 500

Patent

active

061665789

ABSTRACT:
A circuit arrangement (100) is coupled to a resistor (150) having at least two portions (110, 120). The arrangement (100) provides a substantially linear performance of the resistor (150). The arrangement (100) comprises a differential difference amplifier (160) (with input stages (170, 180) and output stage (190)) and a feedback unit (130). The input stages (170, 180) modify first (161) and second (162) measurement signals (e.g., (V.sub.B -V.sub.A) and (V.sub.A -GND), respectively) from the resistor portions (110, 120) to intermediate signals (OPH, OMH, OPL, OML). The output stage (190) differentially amplifies sums (at nodes 191, 192) of the intermediate signals and provides a control signal (CONTROL) which corresponds to a magnitude difference between the first and second measurement signals. The feedback unit (130) receives the control signal and supplies a corrective current (I) to the resistor (150) to offset non-linearity.

REFERENCES:
patent: 5757211 (1998-05-01), Phillips
patent: 5783954 (1998-07-01), Koifman et al.
patent: 5838192 (1998-11-01), Bowers et al.
patent: 5886565 (1999-03-01), Yasui et al.
Dieter Sautter, Hans Weinerth (editors): "Lexikon Elektronik und Mikroelektronik", Zweite Auflage (second edition), VDI Verlag, Dusseldorf 1993, pp. 1131-1132, figures a) and b).
Ali.dagger.J. Rastegar, Janusz Bryzek: "A High-Performance CMOS Processor for Piezoresistive Sensors", Sensors, Oct. 1997, pp. 82-87.

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