A photodiode signal conditioning circuit for projectile velocity measurement

In order to keep photodiode signal conditioning circuit could response to the very short pulse when projectiles cross the light mesh, the bandwidth of conditioning circuit should be increased and noise should be avoided. The key influencing factors on the bandwidth limit are analysed, and two optimization methods have been put forward at the same time. In the end, several experimental verification experiments are made to verify the two optimization methods which are put forward previously. The experimental results demonstrate that the former optimization method still could not be applied into the signal conditioning circuit, and the latter could improve the performance.