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ripples at output of LF351

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uzmeed

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hi

i m using a DAC circuit using DAC 0808 with LF 351 at its output to derive a VCO

the LF351 is giving a lot of ripples and for that reason VCO is not functioning properly the ripples are about 800mV

wat is possibe solution to remove the ripples

regards
uzmeed
 

IanP

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You need to design a voltage follower right after the DAC (turns the output into a low-impedance signal) followed by an active low-pass x-pole filter to get rid of the DAC sampling frequency noise ..
:wink:
IanP
 

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