Electronically and Linearly Tunable Voltage-to-Current Converter

This paper describes the realization of the voltage-to-current converter (V/I) with electronically and linearly current tunable. The developed element is realized based on the use of transconductance cells (Gms) as core circuits. The advantage of this element is that its transconductance gain can be tuned electronically and linearly by adjusting external DC bias currents. The circuit is designed and analyzed in 0.35-m TSMC CMOS technology. Simulation results for the circuit with 1.25-V supply voltages show that it consumes only 0.43 mw quiescent power with 90 MHz bandwidth. The performance of the proposed circuit is discussed and confirmed through PSPICE simulation results. To display the performace of the proposed circuit, an application on the realization of the current multiplier circuit is also included and discussed.