J. M. Carrillo, M. A. Domínguez, J. F. Duque-Carrillo, G. Torelli
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1.2-V fully differential OTA-C lowpass filter based on bulk-driven MOS transistors
An OTA-C filter implementation suited to low-voltage operation is presented. An operational transconductance amplifier (OTA) based on a bulk-driven input stage with enhanced DC gain and bandwidth was designed and included in a 1.2-V tunable fully differential second-order OTA-C lowpass filter. Experimental results, obtained in standard 0.35-µm CMOS technology, showed a dynamic range around 70 dB with a total power consumption of 382 µW for a filter cutoff frequency of 3 MHz.
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