Paper Info
Title
Realization Of Current-Mode Khn-Equivalent Biquad Using Current Follower Transconductance Amplifiers (Cftas)
Abstract
In this letter a new active element the Current Follower Transconductance Amplifier (CFTA) for the realization of the current-mode analog blocks is presented. The element is a combination of the Current Follower (CF) and the Balanced Output Transconductance Amplifier (BOTA). Possible internal structure of the CFTA is presented. The usage of the new active element is shown on the design of the Kerwin-Huelsman-Newcomb (KHN) structure working in the current mode. The frequency filter using the CFTA elements has been designed using the signal-flow graphs. The circuit structure employs three CFTA elements and two grounded passive elements. The filter enables realizing not only the basic functions as the low- (LP), band- (BP) and high-pass (HP) but also the notch and all-pass (AP) filter. The advantage of the structure presented is that the outputs of the filter are at high impedance and hence it is not necessary to use other auxiliary active elements. The properties of the filter proposed were verified by sensitivity and AC analyses in the PSPICE program.
Year
DOI
Venue
2010
10.1587/transfun.E93.A.1816
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES
Keywords
Field
DocType
CFTA, current-mode circuit, KHN-biquad
Topology,Balanced audio,Digital biquad filter,Driven element,Control theory,Operational transconductance amplifier,Theoretical computer science,Transconductance,Current mode,High impedance,Mathematics,Amplifier
Journal
Volume
Issue
ISSN
E93A
10
0916-8508
Citations 
PageRank 
References 
4
0.78
2
Authors
3
Name
Order
Citations
PageRank
Norbert Herencsar112937.45
Jaroslav Koton29324.27
Kamil Vrba311436.56