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Active RC Electronic Biquad/Universal Self-Compensated Filters PATENTS

TECHNOLOGY DESCRIPTION

2° order, 3 base-stages biquad/universal continuous time analog active filters type resonant and, more particulary, active full self-compensation techniques to improve the frequency range, the stability and/or the selectivity of the filters themselves with a very low, or as if zero, cost.

These active filters techniques are the only ones that can (fully) erase the parasitic poles'effects using a single resistor or an additional operational amplifier that has a functionally filtering output.

Said inventions are divided into 2 patent families:


1° Patent Family (publication numbers):

IT1338618 B1 (granted); US7038531 B2 (granted); EP1470640 A1


2° Patent Family (publication numbers):

ITMI20031566 A1(very first application); US2006197587 A1; EP1665525 A2

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Date Joined:	2009-11-11 04:23:13
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