Electronic Device And Electronic Circuit

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Wednesday, July 19, 2006

Simple Frequency to Voltage circuit

Frequency-to-Voltage converter circuit can use LM331
(Precision Voltage-to-Frequency Converters) by circuit below
But out put form pin 1 of lm331 is current so we must be careful
Input impredance of circuit that connected with this circuit

Fin 10kHz full scale
Vout = Fin * 2.09V*(RL/Rs)*(Rt*Ct)