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A new self Q-tuning scheme for biquad OTA-C filters

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5 Author(s)
Font, J. ; Phys. Dept., Univ. of Balearic Islands, Palma de Mallorca, Spain ; Isern, E. ; Roca, M. ; Picos, R.
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A new Q-tuning scheme for biquad OTA-C filters is presented. We have taken benefit of the advantages of the classical Phase-Locked Loop scheme to tune the center frequency and we have also applied it to Q-tuning. The unique requirement for these biquad filters is that fo-tuning and Q-tuning must be uncoupled and independent. Tunability and versatility of OTAs have been fully exploited attaining quality factors with accuracy errors smaller than 1%.

Published in:
Devices, Circuits and Systems (ICCDCS), 2012 8th International Caribbean Conference on

Date of Conference: 14-17 March 2012

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