Hi
I have a function generator based on the venerable (=crap and no longer available) 8038. The square and triangle waves seem pretty clean, but the sine has a funny glitch that appears as the frequency increases. Here it is circa 1KHz:[1]
Would I be way off the mark thinking that decoupling capacitor(s) near the chip might fix the problem? If so, given that the chip uses +/-15V would 2 caps, one from Vcc to ground and one from Vee to ground be needed? It's a ready made PCB so I'm going to have to bodge something up on the solder side.
If I'm wrong, what might be the cause?
Cheers
John
[1] Courtesy of my shiny new
DS1052 DS1102. Winking smiley.