m-a-r-i-n Posted December 19, 2006 Report Share Posted December 19, 2006 Hy there,i' need help to create some project. I must create frequency to voltage converter in electronic workbench and simulate. In workbench i have analog IC-s operational ampifflier and monostabile, but i dont have already made IC frequency to voltage converter. Frequency to voltage converter is primary part of the project, other part-s is easy to create...so i need help to create frequency to voltage converter with components in EWB 5... ??? ??? Quote Link to comment Share on other sites More sharing options...
AN920 Posted December 19, 2006 Report Share Posted December 19, 2006 Here are some hints:-Square up your input frequencyApply to the monostable to get fixed pulse width on every cycleFilter the pulses with a low pass filterScale and calibrate output with opamp if neededVoltage reading should be proportional to applied frequency Quote Link to comment Share on other sites More sharing options...
m-a-r-i-n Posted December 21, 2006 Author Report Share Posted December 21, 2006 Thanks on help ;) I have build frequency to voltage converter with operational amplifier and works really good. Quote Link to comment Share on other sites More sharing options...
AN920 Posted December 21, 2006 Report Share Posted December 21, 2006 Good! I see you used an integrator to give you proportional voltage according to pulse width. Then it looks like you inverted this and scaled it with your last opamp. There are many ways to do this. Some methods will give you very good linearity and other not so well. It appears that you operate at low frequencies? Quote Link to comment Share on other sites More sharing options...
m-a-r-i-n Posted December 23, 2006 Author Report Share Posted December 23, 2006 >It appears that you operate at low frequencies?yes, the range of frequencies is 30-100Hz Quote Link to comment Share on other sites More sharing options...
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