Biquad filter design using VDCC (Earth resistor help in designing of biquad filter using VDCC)

Abstract

(Analog VLSI can deal with nearly all real world issues and has extended its range of circuits (amplifier, filters, communication circuits, current comparators etc) for new information processing applications in numerous fields like integrated sensors, image processing, speech recognition, hand writing recognition etc.This lead to an increased interest in the evolution process of active elements which are used for analog signal processing.

Current conveyors an excellent linear active element with high bandwidth, greater dynamic range and better high frequency response has evolved as a building block for higher efficiency blocks. Evolved in 1968 as the first generation current conveyor, the block gained huge reputation with the second generation in 1970 and the third generation in 1995.

Voltage Differencing Current Conveyor (VDCC) is emerging as quite flexible and versatile building block for analog circuit design. Here an attempt has been made to highlight the realization of the VDCC active block using MOSFETs and VDCC based biquad filter. The workability of the circuit is supported by PSPICE simulations using TSMC 0.18μm parameters.