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Insensitive High-Output Impedance Current-Mode Biquad with a Single Current Follower Transconductance Amplifier
Author(s)
Date Issued
January 1, 2017
Type
Conference Paper
Abstract
The circuit configuration for realizing a canonical current-mode biquad filter with three inputs and one output is introduced. The introduced filter employs a single current follower transconductance amplifier (CFTA) and a minimum of passive components, i.e., one resistor and two grounded capacitors. It is capable of generating all the five standard biquadratic filtering functions and suitable for current-mode cascading by possessing high-output impedance. Also, the proposed filter can be tuned electronically by an external bias current of the CFTA. The circuit is analyzed for the non-idealities of the used CFTA and possesses attractive low sensitivity performance. PSPICE simulation results are found to be in good agreement with the presented theory.
Citation
Lecture Notes in Engineering and Computer Science, 2228, 684-687, 2017