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Passive switched-capacitor filter with complex poles for high-speed applications.
- Source :
-
Electronics Letters (Wiley-Blackwell) . 9/15/2016, Vol. 52 Issue 19, p1592-1593. 2p. 3 Diagrams, 1 Chart, 3 Graphs. - Publication Year :
- 2016
-
Abstract
- Anovel complex-pole switched-capacitor lowpass filter topology is presented. The proposed scheme features sharper roll-off in the frequency response and reduced in-band loss compared with a real-pole filter. It provides higher stop-band rejection for the same bandwidth. Hence, the required filter order and chip area are reduced. These improvements are achieved without adding more active blocks to the real-pole filter, and with minimal added complexity. The proposed filter has the same low-output thermal noise level as the real-pole filter. These features, combined with a wide-frequency tuning range, make the filter suitable for high-speed, low-noise, and low-power applications. A fourth-order 200 MS/s filter prototype was designed in 0.18 μm Asahi Kasei Microdevices Corporation CMOS technology. Simulations verify that the average in-band loss is reduced by 3.2 dB compared with the realpole filter. The 3 dB cut-off frequency can be tuned from 470 kHz to 17.5 MHz with 100 dB maximum stop-band rejection. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00135194
- Volume :
- 52
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- Electronics Letters (Wiley-Blackwell)
- Publication Type :
- Academic Journal
- Accession number :
- 118041704
- Full Text :
- https://doi.org/10.1049/el.2016.2487