Title :
Current mode tunable KHN filter based on controlled MO-CFTAs
Author :
Sotner, Roman ; Petrzela, Jiri ; Slezak, Josef
Author_Institution :
Dept. of Radio Electron., Brno Univ. of Technol., Brno, Czech Republic
Abstract :
This paper deals with application of novel active block called multiple-output current follower transconductance amplifier (MO-CFTA) in multiple-loop structure of current mode active filter. The well-known transconductance amplifier (OTA) is modified in such a way that single-input multiple-output active block is obtained. Using this device in the suggested network structure allows us to achieve low pass (LP), high pass (HP), band pass (BP) and band reject (BR) filter. The effects of the parasitic properties of the active devices as well as biquad sensitivities are briefly discussed. The possibility of electronic tuning of the main parameters of the individual filter configuration is verified.
Keywords :
active filters; band-pass filters; band-stop filters; circuit tuning; current-mode circuits; high-pass filters; low-pass filters; operational amplifiers; active devices; band pass filter; band reject filter; biquad sensitivities; controlled MO-CFTA; current mode active filter; current mode tunable KHN filter; electronic tuning; high pass filter; low pass filter; multiple-loop structure; multiple-output current follower transconductance amplifier; network structure; parasitic properties; single-input multiple-output active block; Active filters; Band pass filters; Circuits and systems; Frequency; Signal processing; State feedback; Transconductance; Transfer functions; Tunable circuits and devices; Voltage; current mode; state variable feedback structure; tunable biquad;
Conference_Titel :
Signals, Circuits and Systems (SCS), 2009 3rd International Conference on
Conference_Location :
Medenine
Print_ISBN :
978-1-4244-4397-0
Electronic_ISBN :
978-1-4244-4398-7
DOI :
10.1109/ICSCS.2009.5414170
