Electronic filter circuit

Details Electronic filter circuit Electronic filter circuit

H - Electricity

03

H

333/55

H03H 7/01 (2006.01) H03H 11/12 (2006.01)

Patent

CA 1070783

ABSTRACT OF THE DISCLOSURE To eliminate the high frequency portion of an input signal while permitting low frequency and DC portions to pass, the electronic filter utilizes an n-l order active network in combination with a capacitor to generate 2 shunt current, thereby providing a low pass filter having n-order operating characteristics. Included in the active network is an active element, such as an operational amplifier, which responds to an input signal by creating a vol- tage across the capacitor resulting in a shunt current that in turn provides the desired filter characteristics. In certain special cases the n-order ac- tive filter can utilize a differentiating element in combination with an n-2 order active network along with the capacitor to achieve n-order operating characteristics.

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