An analog sinusoidal frequency-to-voltage converter

An analog sinusoidal frequency-to-voltage (F/V) converter, based on the use of nonlinear analog circuits, is introduced. The realization is composed of a differentiator, an integrator, and a translinear divider and square-rooter circuit. The proposed F/V converter can accurately and linearly convert a sinusoidal signal frequency into an output voltage, with fast response and low error, over more than two decades of frequency range. The method can also be implemented in monolithic integrated form