I'm having trouble with my LM2917 frequency to voltage converter circuit. The input into the chip is an AC sine wave signal from an anemometer. My output voltage is linear up to 40Hz but stops after this frequency. The output voltage from the chip is being fed into an ADC. Does anyone have any ideas what couFounld be causing it to become non linear after 40Hz?. Thanks in advance.
Fixed it. I was using a polarized 2uF capacitor instead of a non-polarized capacitor as is shown in the circuit. When i replaced it the output voltage was linear over 40Hz.