allaccess
New Member
I am having trouble getting LTSpice to simulate oscillations. I drew a schematic of a simple DC source and resistor circuit to make sure I could get the software to work, and after running and adding a current waveform, the waveform displayed just as it should.
Then, I tried two oscillators: a 1 transistor relaxation oscillator, and, a 2 transistor multivibrator. After running and adding a waveform, neither showed any signs of oscillation. Instead of a waveform that went up and down, I just got a flat, steady-state line. I also added the modifier "startup" to the .tran. That didn't make any difference either.
Is there a setting or entry method I don't know about?
Thanks, allaccess
Then, I tried two oscillators: a 1 transistor relaxation oscillator, and, a 2 transistor multivibrator. After running and adding a waveform, neither showed any signs of oscillation. Instead of a waveform that went up and down, I just got a flat, steady-state line. I also added the modifier "startup" to the .tran. That didn't make any difference either.
Is there a setting or entry method I don't know about?
Thanks, allaccess
Last edited: