How to convert sqwtooth waveform to pure DC

[siddarth.ghaste]

HI,
Please help me to convert sawtooth waveform of 2 v to pure DC....

 

[jpsganesh]

what is the frq of sawtooth? and whats the DC load?

 

[goldsmith]

HI,
Please help me to convert sawtooth waveform of 2 v to pure DC....

Hi siddarth.ghaste
What kind of saw tooth wave ? has it any DC component ? or perhaps it is completely simultaneous ?
Can you show me your wave ? and as " jpsganesh " mentioned frequency and load are important too .
Best Wishes
Goldsmith

 

[biff44]

I might go with a series schottky diode with a low Vf and a shunt 1 uF ceramic capacitor.

 

[jpsganesh]

here is the basic circuit for converting sawtooth wave to dc



**broken link removed**

 

[siddarth.ghaste]

Thanks for your help.....I am converting sine wave frequency to voltage using 2917 IC. But output is not constant(it is sawtooth). I increased capacitor value, ripple vanished but response is very slow.And some times output degrades slowly.Please help me to convert frequency to pure DC voltage.

 

[biff44]

You should use a high impedance load to the capacitor, maybe and op amp voltage follower. Then you can use a small capacitor and not see any ripple.

 

[jpsganesh]

u can go with the method used to convert Halleffect AC current sensor o/p to DC conversion.

Some readymade IC can do this RMS voltage to DC voltage level conversion

 

[siddarth.ghaste]

HI,
I am converting Frequency to voltage.But when turns off and turns on then It shows different voltage for same frequency.How to handle this .Please help.