COMPOSITING METHOD FOR ELECTRONIC FILTER

摘要

PROBLEM TO BE SOLVED: To provide a compositing method for an electronic filter, with which the electronic filter of less distortion can be provided even when a transconductance amplifier has considerably distorted input voltage/output current characteristics. SOLUTION: The transmission function of the electronic filter is temporarily provided with a one-side terminated ladder filter composed of a coil, a capacitor and a resistor and afterwards, the coil and the resistor are equivalently converted while using the transconductance amplifier. Thus, the electronic filter is composited by transconductance amplifiers 31a-31g and capacitors 32a-32g respectively having the adverse distortion characteristics of about 30 dB.