Universal Arc Filters for Arc Oscillators with Automatic Sequential Filtration
There are situations,when it is not possible to use standard types of filters,mainly because of demands on using of digital tuning of complex filter and concurrently usage of higher amount of transfer functions,which can be low pass-LP,high-pass-HP,band-pass-BP,band-reject-BR,but also low or high-pass notch-LPN/HPN and all-pass-AP.For this purpose,we mostly use 2nd order ARC filters,which contain three or more operational amplifiers(OA).Concerning these blocks,tuning or control of this filter is usually the easiest.Except very familiar known filters as Akerberg-Mossberg,Kervin-Huelsman-Newcomb or Towa-Thoma,there is a further amount of circuit connections of universal ARC filters,which enable to realize the transfer function of biquad.The article mainly deals with some other circuits,which are not so familiar,but can be also successfully used as universal filters.These filters realizing required circuit functions with the possibility of tuning of basic parameters of the circuit have been used in special circuits with ARC oscillators for very low distortion with maximum suppression of third harmonics.
Lubomír Fr(o)lich Ji(r)í Sedlá(c)ek Martin Friedl
Brno,FEEC BUT,UTEE,Kolejn?3 2906/4,Brno 612 00,Czech Republic
国际会议
Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)
苏州
英文
1008-1012
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）