Current-mode MISO filter using CCCDTAs and grounded capacitors

Abstract

470-477This paper presents the current-mode multi-input single-output (MISO) biquadratic filter using current-controlled current differencing tranconductance amplifier (CCCDTA) as an active building block. The proposed circuit comprises three CCCDTAs and two grounded capacitors performing completely standard functions: low-pass, high-pass, band-pass, band-reject and all-pass functions and does not require double input current signals as well as inverting input currents. The pole frequency and quality factor of the proposed circuit can be adjusted electronically/independently via dc bias currents. In addition, the filter circuit has low-input and high-output impedance which facilitates easy connecting for current-mode circuit. The proposed circuit uses all grounded capacitors which is very suitable to further develop into an integrated circuit and without requiring any matching condition.<span style="font-size:10.0pt; font-family:" times="" new="" roman","serif";mso-fareast-font-family:calibri;="" mso-bidi-font-family:mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:hi"=""> Moreover, the active and passive sensitivities are low. The PSPICE simulation results are included to show the workability of the proposed circuit.</span