Universal voltage-mode biquad filter using voltage differencing transconductance amplifier

Prasad, Dinesh ; Bhaskar, D. R.; Srivastava, Mayank

Abstract

A new voltage mode multi input single output (MISO) type biquad is proposed. The proposed configuration employs one voltage differencing transconductance amplifier (VDTA) as the active element, two capacitors and a grounded resistor. The configuration realizes all five filter functions [i.e. Low Pass (LP), High Pass (HP), Band Pass (BP), Notch (BR) and All Pass (AP)] without any matching condition. The natural frequency (ω0) and bandwidth (BW) are independently tunable. The workability of proposed configuration has been verified using SPICE simulation with TSMC CMOS 0.18μm process parameters.

Keyword(s)

Voltage mode filter, voltage differencing transconductance amplifier


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