Embedded anti-aliasing in switched-capacitor ladder filters

Author

Senderowicz, Daniel ; Azuma, Shinichiro ; Kawama, S. ; Iizuka, Kunihiko ; Miyamoto, Masayuki

Author_Institution

SynchroDesign Inc., Berkeley, CA, USA

fYear

2001

fDate

2001

Firstpage

13

Lastpage

16

Abstract

A combination of continuous-time and switched-capacitor integrators in a simulated LC loss-less ladder yields a response with suppressed aliasing without using continuous-time pre-filtering. Fabricated in a 0.35-μm CMOS process, a fifth-order Cauer low-pass filter has a cutoff frequency of 1.92 MHz and aliasing suppression of better than 40 dB. Without using any tuning mechanism, ±10% accuracy of the cut-off frequency is achieved. It consumes 3.7 mA at 1.8-V power supply in a die-area of 0.27 mm²

Keywords

CMOS analogue integrated circuits; continuous time filters; integrating circuits; ladder filters; low-pass filters; switched capacitor filters; 0.35 micron; 1.8 V; 1.92 MHz; 3.7 mA; CMOS circuit; LC lossless ladder filter; continuous-time integrator; cutoff frequency; embedded anti-aliasing; fifth-order Cauer low-pass filter; switched-capacitor integrator; switched-capacitor ladder filter; Band pass filters; CMOS process; Capacitors; Cutoff frequency; Low pass filters; Operational amplifiers; Passband; Power supplies; Prototypes; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits, 2001, IEEE Conference on.

Conference_Location

San Diego, CA

Print_ISBN

0-7803-6591-7

Type

conf

DOI

10.1109/CICC.2001.929714

Filename

929714