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Digital tuning of high-order high-Q continuous-time filters

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2 Author(s)
Sumesaglam, T. ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Karsilayan, A.I.

A digital tuning scheme for automatic tuning of high-order high-Q continuous-time filters is proposed. The scheme uses phase information for both centre frequency and Q tuning, and does not rely on the relation between the passband gain and Q factor. Digital control of frequency and Q tuning loops improves the stability by enabling only one loop at a given tuning cycle. High-order filter tuning is performed without separating individual sections, eliminating switches and their parasitics

Published in:

Electronics Letters  (Volume:38 ,  Issue: 19 )