Low-power switched-capacitor filters using charge transfer integrators

Author

Seo, Inchang ; Fox, Robert M.

Author_Institution

Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL, USA

Volume

1

fYear

2003

fDate

25-28 May 2003

Abstract

Charge transfer amplifiers (CTAs) are based on the charge transfer mechanism of a MOS source follower. Here, new switched-capacitor (SC) filter architectures based on charge transfer amplifiers and integrators are presented. To demonstrate the new CTA SC filters, first-order and second-order lowpass and second-order bandpass filters are designed and simulated using minimum-geometry CMOS devices in the IBM6HP 0.25 μm CMOS process. Simulations of first- and second-order lowpass and second-order bandpass filters show very low total power dissipation: of 1.9, 4.0, and 6.1 μW for 500 kHz clock frequency and 0.20, 0.46, and 0.66 μW for 50 kHz clock frequency.

Keywords

CMOS analogue integrated circuits; band-pass filters; integrating circuits; low-pass filters; low-power electronics; switched capacitor filters; 0.2 to 6.1 muW; 0.25 micron; 50 kHz; 500 kHz; IBM6HP CMOS process; MOS source follower; charge transfer amplifiers; charge transfer integrators; first-order lowpass filters; low power SC filters; second-order bandpass filters; second-order lowpass filters; switched-capacitor filter architectures; Band pass filters; Charge transfer; Clocks; Dynamic voltage scaling; Energy consumption; Frequency; MOS devices; Sensor arrays; Threshold voltage; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1205637

Filename

1205637