Highly Linear Wide Dynamic Swing CMOS Transconductance Multiplier Using Source-Degeneration V-I Converters

A novel compact four quadrant CMOS transconductance analog multiplier with wide dynamic swing and wide gain bandwidth product using source- degeneration V-I converters is proposed. The design consists of two stages. First stage is a voltage adder and utilizes two V-I converters with diode connected load and source-degeneration resistor which can provide high bandwidth. The second stage consists of two cross connected differential pairs with source- degeneration resistor which act as current steering elements performing V to I conversion with wide dynamic swing and continuous adjustable gain. Unlike conventional multipliers, in the proposed scheme all the significant intermediate terms generated are linear reducing the non-linear term cancellation, making the circuit power efficient. SPICE simulation results in 0.5 mum CMOS AMI technology are presented which validate the proposed work.