Title :
Polyphase filter section with opamps
Author :
Stikvoort, Eduard
Author_Institution :
Philips Res. Labs., Eindhoven, Netherlands
fDate :
7/1/2003 12:00:00 AM
Abstract :
An RC active polyphase filter section is presented. The section uses three conventional operational amplifiers (opamps). The transfer function has a single pole and optionally a single zero. With a cascade of these sections, any polyphase filter function can be realized. The paper deals with the leakage caused by element deviation and the effects of a limited gain and gain-bandwidth product of the amplifiers.
Keywords :
RC circuits; active filters; linear network analysis; operational amplifiers; poles and zeros; transfer functions; RC active polyphase filter section; analog filter; element deviation; leakage; limited amplifier gain; limited gain-bandwidth product; opamp filter; operational amplifiers; polyphase filter function; section cascade; transfer function; Active filters; Admittance; Coupling circuits; Frequency; Operational amplifiers; Passive filters; Poles and zeros; Resistors; Transfer functions; Voltage;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
DOI :
10.1109/TCSII.2003.812915
