TUNABLE CURRENT-MODE TOW-THOMAS BIQUAD BASED ON CDTAs
نویسنده
چکیده
A new current-mode Tow-Thomas biquad filter based on employing current differencing transconductance amplifiers (CDTAs) is introduced. The filter circuit uses two grounded capacitors and realizes a lowpass (LP) and a bandpass (BP) responses, simultaneously. The proposed circuit is electronically tunable by adjusting the biasing current of the CDTAs. The circuit requires no component matching conditions for realizing the transfer functions listed above. Additionally, the circuit parameters Q and ω0 can be tuned orthogonally by adjusting the bias currents of the CDTAs and grounded capacitors. It is clear from sensitivity analysis that the proposed biquad circuit has very low sensitivities with respect to the circuit components.
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