Title :
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
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;
Conference_Titel :
Custom Integrated Circuits, 2001, IEEE Conference on.
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-6591-7
DOI :
10.1109/CICC.2001.929714
