Open AccessA New Universal Second-Order Filter using Configurable Analog Building Blocks (CABs) for Filed-Programmable Analogue Arrays
Author(s) -
Muhammad Taher Abuelma’atti,
Osama Fares
Publication year - 2011
Publication title -
the journal of engineering research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 9
eISSN - 1726-6742
pISSN - 1726-6009
DOI - 10.24200/tjer.vol8iss1pp83-91
Subject(s) - all pass filter , electronic engineering , filter (signal processing) , block (permutation group theory) , high pass filter , field programmable analog array , analogue filter , band pass filter , spice , computer science , engineering , low pass filter , electrical engineering , digital filter , analog multiplier , analog signal , mathematics , geometry , digital signal processing
In this paper, the design of a universal second-order filter using configurable analog blocks (CABs) for field programmable analog arrays is presented. The configurable blocks are capable of performing integration, differentiation, amplification, log, anti-log, add and negate functions. To maintain high frequency operation, the programmability and configurability of the blocks are achieved by digitally modifying the block's biasing conditions. Using at most four CABs, this article shows that it is possible to design a versatile second-order filter realizing all the standard five filter functions; lowpass, highpass, bandpass, notch and allpass. SPICE simulation results using practical bipolar junction transistor (BJT) parameters confirm the feasibility of using the CABs in designing second-order filters.