EEHobby
Newbie level 6
I have the following simple circuit. When I trigger signal comes into Q1, at P1 a negative spike will be generated and it will be used to excite a transducer. This transducer also acts as a receiver, so the returned signal will be picked up at CH1AO. To protect the circuit after CH1AO, I add two diodes to clamp the voltage. However it seems I can not get it to work. Anybody can me any suggestions? Thanks a lot.