CMOS differential current conveyors and applications for analog VLSI

Abstract

Novel differential current conveyor building blocks are defined. CMOS realizations of these blocks are then given. One of the proposed conveyor circuits is seen to be insensitive to the threshold voltage variation due to the body effect. The properties of the differential current conveyors are shown to be suitable for VLSI applications employing MOS transistors operating in the ohmic region. This is demonstrated by realizing four quadrant multiplier cells, current mode and mixed mode continuous time MOSFET-C filters based on the proposed blocks. PSPICE simulations indicate the excellent performance of the differential current converyor circuits.