Tectonic
Newbie level 2
I'm trying to run an LTSpice model of the Avalanche Pulse Generator detailed on page 93 of Linear Technology's AN47.
This is the circuit found in the application note:
This is my LTSpice design:
The voltage ramps up to 90V just like it's supposed to but the output does not act as described in the application notes. First it oscillates at about 19kHz from 0V to 210nV for about 20ms. After this it drops to 0V for 115ms, and then rapidly pulses for 1 ms between -100nV and 640nV.
Any ideas on how to fix this circuit so that it pulses to 10V instead of 640nV?
This is the circuit found in the application note:
This is my LTSpice design:
The voltage ramps up to 90V just like it's supposed to but the output does not act as described in the application notes. First it oscillates at about 19kHz from 0V to 210nV for about 20ms. After this it drops to 0V for 115ms, and then rapidly pulses for 1 ms between -100nV and 640nV.
Any ideas on how to fix this circuit so that it pulses to 10V instead of 640nV?