Hi everyone,
we are facing a stupid issue with our current signal generator (Agilent
33500B).We are generating, via GPIB, a complementary PWM signal [1] with time delay insertion in order to drive an half H-Bridge to do some measurements. Everything goes fine if we set a fixed value (therefore a fixed dutycycle), Unfortunately the half H-Bridge with an inductive load has a charge pumping effect that screws everything up.
Therefore we need to drive the PWM signals in order to generate a periodic output and limit the charge pumping effect.
When we drive the two signals some times it seems we are losing the synchronization between them and therefore we happened to drive both HBridge transistors at the same time (ouch!).
Bottom line, anyone has some suggestion on tools and or devices or maybe using the same instrument to accomplish the task? We would like to avoid building it out of discrete components since we are somehow convinced that there are solutions readily available, but maybe we are wrong.
The only constraint is the PWM frequency which is quite high (80 kHz).
Thanks a lot,
Al
[1] See example of the PWM signal: ___ ___ ch0. __| |__________| |______ ____ ____________ _______ ch1. |_| |_|