Linearization technique for current mode filters

Details Linearization technique for current mode filters Linearization technique for current mode filters

2006-09-25

2008-08-19

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S558000, C327S344000

Reexamination Certificate

active

07414461

ABSTRACT:
A circuit is disclosed that compensates for the non-linearity of a current mode real pole producing circuit used to generate poles and zeros in complex filter circuits. The non-linearity of the prior art is compensated by driving one end of the primary pole producing capacitor with a signal derived from the drain current and fed back so as to counteract the non-linearity factors.

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patent: 5572162 (1996-11-01), Cotreau
patent: 6433626 (2002-08-01), Guimaraes
patent: 6720817 (2004-04-01), El-Gamal
Smith, Sterling L. et al., Low Voltage Integrators For High-Frequency CMOS Filters Using Current Mode Techniques, IEEE Transactions On Circuits And Systems—II: Analog And Digital Signal Processing, Jan. 1996, vol. 43, No. 1.
Aboushady, H. et al., Systematic Design Of High-Linearity Current-Mode Integrators For Low-Power Continuous-Time ΣΔ Modulators, IEEE International Conference On Electronic Circuits And Systems, ICECS'01, Sep. 2001, Malta.

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