D
David White
- Jan 1, 1970
- 0
I have been studying phase shift oscillators, and built a few up
today. The circuit linked below has a slight problem I can't figure
out.
It is intended to output 10Hz, but the tops of the sinewaves are
slightly skewed to the left, and there is a "kink" as they approach 0
volts before progressing to the next cycle.
http://www.4shared.com/photo/mtkJplbI/Phase-Shift-Oscillator.html?
If I crank the trimmer back to just before the oscillation dies,
everything comes right, but the amplitude drops and wavers around
(unstable). There does not appear to be any in-between adjustment.
I have tried substituting components, to no avail. Can anyone please
explain what is happening, and if there is a fix?
Does it perhaps have to do with the relatively low frequency involved?
Thank you,
David White
today. The circuit linked below has a slight problem I can't figure
out.
It is intended to output 10Hz, but the tops of the sinewaves are
slightly skewed to the left, and there is a "kink" as they approach 0
volts before progressing to the next cycle.
http://www.4shared.com/photo/mtkJplbI/Phase-Shift-Oscillator.html?
If I crank the trimmer back to just before the oscillation dies,
everything comes right, but the amplitude drops and wavers around
(unstable). There does not appear to be any in-between adjustment.
I have tried substituting components, to no avail. Can anyone please
explain what is happening, and if there is a fix?
Does it perhaps have to do with the relatively low frequency involved?
Thank you,
David White