Title :
Compensation of nonideal effects in video-frequency sinc(x)-equalizers using tunable gm-C structure
Author :
Dudek, F. ; Al-Hashimi, B.M. ; Moniri, M.
Author_Institution :
Sch. of Eng. & Adv. Technol., VLSI Signal Process. Group, Beaconside, UK
Abstract :
The authors introduce a new biquadratic tunable gm-C amplitude equalizer structure for correcting sinc(x)-distortion of video D/A converters. Unlike previously reported equalizers, the structure realizes independent electronic control of ω0 and Q by means of gm tuning, allowing simple compensation for active device nonideal effects. A design example is given, demonstrating the tunability and superior equalizer performance when compared with other structures. Simulation and measured results are included in the paper
Keywords :
biquadratic filters; circuit tuning; compensation; digital-analogue conversion; equalisers; video signal processing; active device nonideal effects; biquadratic tunable structure; compensation; equalizer performance; gm tuning; nonideal effects; tunability; tunable gm-C structure; video D/A converters; video-frequency sinc(x)-equalizers; Capacitors; Design methodology; Distortion; Equalizers; Poles and zeros; Transconductors; Transfer functions; Tunable circuits and devices; Very large scale integration; Video signal processing;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780640
