Back to Search
Start Over
On the Evaluation of the Exact Output of a Switched Continuous-Time Filter and Applications.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Jul2008, Vol. 55 Issue 6, p1421-1429. 9p. 2 Black and White Photographs, 6 Diagrams, 1 Chart, 7 Graphs. - Publication Year :
- 2008
-
Abstract
- In this paper, a study of the operation of switched continuous-time filters (SCTFs), defined as continuous-time filters with elements that are alternatively switched on and off in the signal path, is conducted. A well-known example is the use of switched resistors to multiply their value, but the universe of applications is wider. First, a detailed calculation of the output of an SCTF in the frequency domain, which allows the examination of any SCTF in a general framework, is presented. This result particularly explains the resistor multiplication effect. Three application examples using switched elements are presented and examined as SCTFs: a nonideal sample & hold, a switched active filter that is tuned by varying the duty cycle of the switching, and a switched Gm-C filter to implement a chopper amplifier. In all cases, the theoretical background allows the examination of circuit behavior and limitations, and the analysis is supported by measurements or transient simulations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 55
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 33526268
- Full Text :
- https://doi.org/10.1109/TCSI.2008.917999