fringe
Newbie level 2
Help needed to control the pulse width of a (negative) -15vdc pulse train at 20khz..
Basically, the pulse is as described in the picture attached which is of the pulse itself all details are within picture.
I will not need to vary the frequency only the pw..
I would like to use something very simple... I have been searching everywhere.
However, most designs are base on negative going pulses on a +dc supply and not on a wave form that actually goes positive from a negative -15vdc supply.....
please idea's would be great appreciated.
Ps: The pulse train controls a fet driven NEG Dc chopper circuit (high current)
Thanks to all who take the time to at least read this post.
Basically, the pulse is as described in the picture attached which is of the pulse itself all details are within picture.
I will not need to vary the frequency only the pw..
I would like to use something very simple... I have been searching everywhere.
However, most designs are base on negative going pulses on a +dc supply and not on a wave form that actually goes positive from a negative -15vdc supply.....
please idea's would be great appreciated.
Ps: The pulse train controls a fet driven NEG Dc chopper circuit (high current)
Thanks to all who take the time to at least read this post.