Spectral analysis of double-sampling switched-capacitor filters

Author

Rijns, J.J.F. ; Wallinga, H.

Author_Institution

Dept. of IC-Technol. & Electron., Twente Univ., Enschede, Netherlands

Volume

38

Issue

11

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

1269

Lastpage

1279

Abstract

The double-sampling scheme (DSS) design technique is suitable for the realization of high-frequency switched-capacitor (SC) filters. This design technique effectively doubles the applicable frequency range of standard bi-phase SC filters. In practice, the particular nonideal properties of the double-sampling scheme result mainly in parasitic sidebands in the output spectrum. The DSS design technique is described, and a spectral analysis of double-sampling SC filters, including the nonideal properties, is given. With these results, the precise specifications for the pre- (anti-aliasing) and postfilter are derived. An excellent match between the analytical description and experimental results is found for a linear fifth-order elliptic double-sampling SC low-pass filter designed for video frequency applications

Keywords

filtering and prediction theory; ladder networks; low-pass filters; network synthesis; spectral analysis; switched capacitor filters; HF type; SC filters; anti-aliasing; design technique; double-sampling; elliptic filter; high-frequency; ladder filters; linear fifth order filter; low-pass filter; nonideal properties; postfilter; prefilter; spectral analysis; switched-capacitor filters; video frequency applications; Active filters; Bandwidth; Charge transfer; Circuits; Clocks; Decision support systems; Frequency; Low pass filters; Sampling methods; Spectral analysis;

fLanguage

English

Journal_Title

Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0098-4094

Type

jour

DOI

10.1109/31.99156

Filename

99156