Herencsar, N., Koton, J. and Vrba, K. (2009) Electronically Tunable Phase Shifter Employing Current Controlled Current Follower Transconductance Amplifiers (CCCFTAs). 32nd International Conference on Telecommunications and Signal Processing, Hungary, 26-27 August 2009, 54-57.

has been cited by the following article:

• TITLE: Current-Controlled CFTA Based Fractional Order Quadrature Oscillators

  AUTHORS: Tada Comedang, Pattana Intani

  KEYWORDS: Fractional Order, Quadrature Oscillator, Current-Controlled Current Follower Transconductance Amplifier

  JOURNAL NAME: Circuits and Systems, Vol.7 No.13, November 21, 2016

  ABSTRACT: This paper presents a study of fractional order quadrature oscillators based on current-controlled current follower transconductance amplifiers (CCCFTA). The design realisation and performance of the fractional order quadrature oscillators have been presented. The quadrature oscillators are constructed using three fractional capacitors of orders α = 0.5. The fractional capacitor is not available on the market or in the PSPICE program. Fortunately, the fractional capacitor can be realised by using the approximate method for the RC ladder network approximation. The oscillation frequency and oscillation condition can be electronically/orthogonally controlled via input bias currents. Due to high-output impedances, the proposed circuit enables easy cascading in current-mode (CM). The PSPICE simulation results are depicted, and the given results agree well with the anticipated theoretical outcomes.