Wide bandwidth CMOS four-quadrant mixed mode analogue multiplier using a second generation current conveyor circuit

Abstract

This paper presents a new realization for a CMOS four-quadrant analogue multiplier. The proposed circuitis composed of three second generation current conveyor circuits (CCII), two NMOS transistors operating in the linearregion, and four passive resistances. It can be operated in current mode and voltage mode without changing the circuittopology. The simulations results of the proposed mixed mode multiplier are verified by TSPICE simulator based onthe BSIM3v3 transistor model for TSMC 0.18 µm CMOS process available from MOSIS at 25 ◦ C with ±0.8 V supplyvoltage. Through the use of resistive compensation with different passive resistance values, the voltage mode responsespresent ±0.25 V dynamic range with THD less than 0.114% and wide bandwidth extended from 3.42 GHz to 4.1 GHz.The current mode responses show ±150 µA dynamic range with a maximum THD value about 0.083% and largebandwidth expanded from 2.67 GHz to 3.12 GHz.