Synthesis of Arc Ladder Filters with Transmission Zeros for Using in the Feed Back of the Phase Lock Loop
In the field of a measurement of the fast one shot processes there is necessary to use special frequency filters.This frequency filter is usually connected in the feed back circuit of the phase lock loop(PLL),where performs a fine tuning of the frequency.Therefore the synthesis and optimization of the ARC ladder filters with transmission zeros based on frequency dependent negative resistors(FDNR)was elaborated.Frequency filters designed using approximation functions with transfer zeros(like Inverse Tchebyschev or Cauer functions)exhibit in comparison to approximation functions with monotonic magnitude response in stop band essential higher steepness of magnitude response in area of transitive band of filter.Active RC filters synthesized using modern active elements grown from passive RLC filter prototypes with very small sensitivity on passive elements can be in comparison to their RLC prototypes realized relative easily.These filters designed using active FDNR blocks as LP(low pass)filters or using SI(Simulated inductors)active blocks in case of HP(high pass)filters can be designed with minimum active and passive elements.During resulting optimization filter design process must be an influence of real lossy active blocks(FNDR,SI)on resulting filter response respected.In contribution here are presented some possibilities of filter optimization from this point of view.There are also discussed and in some examples prescribed ways of filter synthesis with account of influence of lossy active blocks on resulting filter magnitude response in case of Inverse Tchebyschev and Cauer filter of LP and HP filters of higher(from 3rd to 7th)filter orders.
Martin Friedl Lubomír Fr(o)hlich Ji(r)í Sedlá(c)ek
Brno,FEEC BUT,UTEE,Kolejní 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
977-980
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）