| 摘要 |
The invention relates to the measurement of current pulses that are very brief (a few nanoseconds) and of very low amplitude (a few microamps), such as those that can emanate from a photodetector used for the optical transmission of data at very high speed, or from a photodetector (photodiode or photoconductor) subject to a radiation that is of pulsed nature (in particular: X, gamma and other radiations). The circuit according to the invention comprises an integration stage (IT), a differentiation stage (DR), and a subtraction stage (SS). The time constants Rp.Cint and R 2 .C 2 of the integration and differentiation stages are preferably equal.
|
