Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 30, 2010
Patent Application Number
11995025
Date Filed
February 8, 2006
Patent Primary Examiner
Patent abstract
A plurality of low-pass filters (2-1, 2-2, 2-3) are cascaded to the post stage of an OTA (1) and a plurality of high-pass notch filters (3-1, 3-2, 3-3) are cascaded further to the post-stage thereof so that a high-pass filter having a Q is not connected to the output of the OTA (1) having a high output impedance and a capacitor having a low capacitance is not connected with the output of th OTA (1) thus preventing multifeedback and avoiding such problems as the zero point of the notch filter (BEF) deviates from a design value or oscillation takes place.
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