Chang, C.M. and Pai, S.K. (2000) Universal Current-Mode OTA-C Biquad with the Minimum Components. IEEE Transactions on Circuits and Systems-I: Fundamental Theory and Applications, 47, 1235-1238.
http://dx.doi.org/10.1109/81.873877

has been cited by the following article:

• TITLE: New Single Input Multiple Output Type Current Mode Biquad Filter Using OTAs

  AUTHORS: Manish Gupta

  KEYWORDS: Active Filters, Current Mode, Operational Transconductance Amplifier, Universal Filter

  JOURNAL NAME: Circuits and Systems, Vol.7 No.4, April 21, 2016

  ABSTRACT: This paper presents a new current mode (CM) single-input and multi-output (SIMO)-type biquad using two multiple output OTAs and one current follower as an active device and having two grounded capacitors. This SIMO type circuit realizes all the five filter functions as low pass, band pass, high pass, band reject and all pass filter transfer functions simultaneously. This circuit has the unity gain transfer function for all the five types of filters. The circuit enjoys electronic tunability of angular frequency and bandwidth. The 0.18 μm TSMC technology process parameters have been utilized to test and verify the performance characteristics of the circuit using PSPICE. The sensitivity analysis, transient response and calculations of total harmonic distortion have also been shown.