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Tuning strategies in high-frequency integrated continuous-time filters

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2 Author(s)
VanPeteghem, P.M. ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Rujiang Song

Three approaches for tuning integrated continuous-time filters are discussed and compared. Results are presented that refer, but are not limited to, second-order bandpass filters implemented with transconductance amplifiers and capacitors (OTA-C filters). It is shown that tuning with two frequencies has superior performance over single-frequency tuning: in this first case, center frequency, bandwidth, and midband gain of a biquad can be tuned exactly; in the second case, only center frequency and midband gain can be so tuned

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Circuits and Systems, IEEE Transactions on  (Volume:36 ,  Issue: 1 )