Jun 2, 2011 #1 T tech_pro Member level 2 Joined Oct 1, 2010 Messages 46 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,634 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
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
Jun 2, 2011 #2 I IanP Advanced Member level 7 Joined Oct 5, 2004 Messages 7,929 Helped 2,311 Reputation 4,624 Reaction score 531 Trophy points 1,393 Location West Coast Activity points 66,416 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
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