Operational Floating Current Conveyor Based TAM & TIM Shadow Filter (original) (raw)

MatSciRN: Process & Device Modeling (Topic), 2018

Abstract

This paper puts forward an all new electronically tunable filter namely “Shadow Filter” which is not only capable of achieving a constant bandwidth, but also capable of features such as variable center frequencyconstant bandwidth filter. This is achieved by using operational floating current conveyor (OFCC) based Trans Admittance mode (TAM) as well as Trans Impedance mode (TIM) with a Trans Admittance Amplifier (TAM) amplifier in a feedback path. The proposed configuration allows adjustment of filter parameters such as the 3dB frequency and the Q-factor of the filter through gain of the used amplifier which in turn is controlled only by only one grounded passive element. The obtained filter is low pass-controlled band pass filter (LP_BP). To facilitate electronic tuning of the filter parameters, MOS-based implementation of grounded resistors is used. The operation of the proposed filters is verified through SPICE simulations using 0.5μm technology model parameters from MOSIS (AGILENT).

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