A Novel Realization of Low-Power and Low-Distortion Multiplier Circuit with Improved Dynamic Range

Abstract

A novel topology of four-quadrant analog multiplier circuit is presented in this paper. The voltage mode technique is employed to design the circuit in CMOS technology. The dynamic input and output ranges of the circuit are improved owing to the fact that the circuit works in the saturation region not in weak inversion. Also the proposed multiplier is suitable for low voltage operation and its power consumption is relatively low. In order to verify the performance of the proposed circuit, performance of the circuit affected by second order effects including transistor mismatch and mobility reduction is analyzed in detail. It will be shown that any conceivable mismatch in the transistor parameters leads to second harmonic distortion. Additionally, the effect of mobility reduction in the third harmonic distortion will be computed. In order to simulate the circuit, Cadence and HSPICE software are used with TSMC level 49 (BSIM3v3) parameters for 0.18 m CMOS technology, where under supply voltage of 1.5 V, total power consumption is 44 W, the corresponding average nonlinearity remains as low as 1 %, and the input range of the circuit is 400 mV.