SESSION TP3

SALON 7

FILTERS

Chair: S. Lewis, Univ. of California, Davis, CA
Associate Chair: D. Allstot, Oregon State Univ., Corvallis, OR

3.1 - A Gain-Controlled Integrator Technique for a 50MHz, 100mW, 0.4um CMOS, 7th-order Equi-ripple Gm-C Filter - 1:30 PM

K. Toyota, T. Matsuura, K. Hase Hitachi Ltd., SemiConductor Technology Dev. Center, Kokubunji, Tokyo, Japan

A 7th-order 0.05 degree equi-ripple Gm-C filter with 50MHz cutoff frequency dissipates 100mW from 3.3V and occupies 2.2mm2 in 0.4um CMOS. It uses biquads with two lossy integrators, a gain-tuning circuit, and dummy circuits for capacitive-load matching.

3.2 - A 3V 10MHz Pseudo-Differential SC Bandpass Filter Using a Gain Enhancement Replica Amplifier - 2:00 PM

A. Nagari, G. Nicollini SGS-Thomson Microelectronics, Agrate Brianza, Italy

An SC biquad bandpass filter with a 10MHz center frequency and Q=10 dissipates 23mW from 3.0V and occupies 0.3mm2 in 0.8um single-poly double-metal n-well CMOS. The opamp has an open-loop unity gain bandwidth of 850MHz, 62 degree phase margin, and 50dB dc gain.

3.3 - A Sampled-Data Switched-Current Analog 16-Tap FIR Filter with Digitally Programmable Coefficients in 0.8um CMOS - 2:30 PM

Y-L. Cheung, A. Buchwald1 Hong Kong Univ. of Science and Tech., Clear Water Bay, Hong Kong 1Broadcom Corp., Irvine, CA

A switched-current 16-tap analog FIR filter with fully-programmable digital coefficients for a 64-QAM adaptive equalizer gives -46dB THD (1MHz) and -42dBc IMD (1MHz, 1.5MHz). It dissipates 70mW at 20MSample/s from 5V, and occupies 4.25mm2 in 0.8um CMOS.

BREAK 3:00 PM

3.4 - A 1.2V BiCMOS Class AB Log-Domain Filter - 3:15 PM

M. Punzenberger, C. Enz Swiss Federal Institute of Technology, Lausanne, Switzerland

A 3rd-order Chebyshev filter uses a class AB translinear structure to achieve a 10kHz to 15MHz frequency tuning range. The dynamic range at 1% THD is 65dB. Tuned to 320kHz it dissipates 65uW from 1.2V, and occupies 0.55mm2 in 1um BiCMOS.

3.5 - A 1V 1.8MHz CMOS Switched-OpAmp SC Filter with Rail-to-Rail Output Swing - 3:45 PM

A. Baschirotto, R. Castello University of Pavia, Pavia, Italy

An SC bandpass biquad uses opamps with switched output stages and switched compensation capacitors to allow operation at 1V. The dynamic range for 3% IM is 50dB and the PSRR is -45dB at 450kHz. It dissipates 160uW and occupies 0.15mm2 in standard 0.5um CMOS technology.

3.6 - A 70mW 7th-Order Filter with 7 to 50MHz Cut-off Frequency Programmable Boost and Group-Delay Equalization - 4:15 PM

F. Rezzi, M. Cazzaniga1, I. Bietti2, R. Castello1 SGS-Thomson Microelectronics, San Jose, CA 1University of Pavia, Pavia, Italy 2SGS-Thomson Microelectronics, Dublin, Ireland

A 7th-order phase-equiripple continuous-time filter uses three 7b DACs to program cutoff frequency (7 to 50MHz), boost (0 to 13dB), and group delay slope ( 30%). It provides 400mVpp output with 1% THD, dissipates 70mW from 5V at 50MHz, and occupies 0.96mm2 in a 0.7um BiCMOS technology.

CONCLUSION 4:45 PM

Go back to Table of Contents