Configuration for realising a current-mode universal filter and dual-mode quadrature single resistor controlled oscillator

Abstract

A new universal single input multiple output (SIMO)-type universal filter configuration using three dual output current conveyors (DOCCII) and five grounded passive elements is proposed which can realise all the five basic filtering functions namely low pass, high pass, band pass, band stop and all pass in current mode from the same configuration. With appropriate modification of one connection, the circuit can also be converted into a quadrature oscillator capable of providing two voltage mode outputs and as well as two current mode outputs in quadrature. The workability of the new configuration has been demonstrated by simulation program with integrated circuit emphasis (SPICE) simulation results based on a complementary metal oxide semiconductor field effect transistor current conveyor II (CMOS CCII) implemented in 0.35-μm technology.