Title :
On the analysis of switched continuous time filters
Author :
Arnaud, Alfredo ; Miguez, Matías
Author_Institution :
Dept. de Ing. Electr., Univ. Catolica, Montevideo
Abstract :
A study of the operation of switched continuous time filters (SCTF), defined as continuous time filters with elements that are alternatively switched on and off in the signal path, is conducted. A detailed calculation of the output of a SCTF in the frequency domain, which allows a fast but exact analysis of any SCTF in a general framework, is presented. Several applications of SCTFs are shown and examined using the developed theory, including a non-ideal Sample & Hold, the realization of fully integrated extremely large time constants, filter tuning by varying the duty-cycle of the switching. A detailed noise analysis for switched operated filters is also presented.
Keywords :
continuous time filters; filtering theory; filter tuning; frequency domains; noise analysis; switched continuous time filters; Band pass filters; Capacitors; Filtering theory; Frequency domain analysis; Operational amplifiers; Passive filters; Resistors; Switches; Tuning; Voltage control;
Conference_Titel :
Micro-Nanoelectronics, Technology and Applications, 2008. EAMTA 2008. Argentine School of
Conference_Location :
Buenos Aires
Print_ISBN :
978-987-655-003-1
Electronic_ISBN :
978-987-655-003-1
