A Wideband Linear Sinusoidal Frequency to Voltage Converter With Fast Response Time.

Abstract: In this paper we have proposed and implemented a wideband sinusoidal frequency to voltage converter (FVC) based on R-C network for high frequency to voltage conversion for frequency. In the converter, R-C network is used as a wideband differentiator, whereas absolute value circuit with amplifier as a rectifier and filter circuit to remove the ripples in the output. The circuit was simulated and designed by using PSPICE software. The linearization of the output was verified with consideration of parasitic effect. It is seen in the simulation that the circuit shows linearity (<0.25%) of frequency to voltage conversion up to 100MHz Oscilloscope traces shows ripple voltage of 150mV and 90mV at operating frequency of 1MHz and 4MHz with output converted voltages 1.2V and 4.8V respectively which proves high linearity of conversion in comparison to the existing sinusoidal FVC. [Copyright &y& Elsevier]