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This article presents a current-mode universal biquadratic filter (low-pass, high-pass, band-pass functions), based on multiple-output current controlled current conveyor transconductance amplifiers (MO-CCCCTAs). The features of the circuit are that: the quality factor and pole frequency can be tuned orthogonally via the input bias currents: the circuit description is very simple, consisting of merely...
This paper presents switched-capacitor bandpass filters used within the sense system of implantable medical devices such as cardiac pacemakers and defibrillators. This work examines the methods; including filter architecture, discrete-time transformation, and operational amplifier (opamp) topology; to reduce current consumption and to lower supply voltages for switched capacitor filters to reach nano-watt...
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