The design of widely programmable low-pass second order G(m)-C filter for telecom applications is presented. A digital tuning scheme is proposed for getting a frequency programmability range from 1MHz to 40MHz compensating the technological spread. The digital tuning circuitry can be turned off, during signal processing. A 0.18mum CMOS technology with a 1.8V power supply has been used for the filter design. A 62dB constant dynamic range is obtained for the filter programmability range by switching input transistors sizes and bias currents of each OTA of the filter.
D'Amico, S., Baschirotto, A. (2003). 0.18µm CMOS Gm-C digitally tuned filter for telecom receivers. In PROCEEDINGS OF THE 2003 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL I: ANALOG CIRCUITS AND SIGNAL PROCESSING (pp.493-496) [10.1109/ISCAS.2003.1205608].
0.18µm CMOS Gm-C digitally tuned filter for telecom receivers
Baschirotto, A
2003
Abstract
The design of widely programmable low-pass second order G(m)-C filter for telecom applications is presented. A digital tuning scheme is proposed for getting a frequency programmability range from 1MHz to 40MHz compensating the technological spread. The digital tuning circuitry can be turned off, during signal processing. A 0.18mum CMOS technology with a 1.8V power supply has been used for the filter design. A 62dB constant dynamic range is obtained for the filter programmability range by switching input transistors sizes and bias currents of each OTA of the filter.
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