Title :
Signal flow graph realization of nth-order current-mode allpass filters using CFTAs
Author :
Intawichai, Kritsakon ; Tangsrirat, Worapong
Author_Institution :
Fac. of Eng., King Mongkut´s Inst. of Technol. Ladkrabang (KMITL) Ladkrabang, Bangkok, Thailand
Abstract :
In this paper, a general synthesis procedure of using the signal flow graph (SFG) technique to realize an nth-order allpass current transfer function with current follower transconductance amplifiers (CFTAs) and grounded capacitors has been presented. The proposed circuit, in general, contains at most n+1 CFTAs and n grounded capacitors, without needing external passive resistors. It has been also show that the design procedure given here is simple structure, convenient tenability, and suitable for integration. Furthermore, the circuit has low sensitivity. PSPICE simulation results which agree very well with the theoretical analysis are also included.
Keywords :
all-pass filters; capacitors; current-mode circuits; operational amplifiers; sensitivity; signal flow graphs; CFTA; PSPICE simulation; SFG technique; allpass filter; current follower transconductance amplifiers; grounded capacitors; nth order allpass current transfer function; sensitivity; signal flow graph; Active filters; Capacitors; Filtering theory; Flow graphs; Sensitivity; Transconductance; Transfer functions; Current Follower Transconductance Amplifier (CFTA); Signal Flow Graph (SFG); allpass filter;
Conference_Titel :
Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2013 10th International Conference on
Conference_Location :
Krabi
Print_ISBN :
978-1-4799-0546-1
DOI :
10.1109/ECTICon.2013.6559519
