| 摘要 |
A sensing arrangement for sensing charged particles and/or quanta of electromagnetic radiation has a sensor device ( 12 ) and amplifier circuitry ( 14 ). The sensor device ( 12 ) provides a sensor signal to an imput mode (vin) of the amplifier ( 14 ) to cause the level at the amplifier output mode (vout) to change. A negative feetback device (T 1 ) responds to the change in level of the output node (Vour) to vary the feedback effect to increase the loop again of said amplifier circuitry ( 14 ). A current mirror (T 2, T 3 ) resets the input node (vin) to its initial level. Single particle and integrating sensor arrangements are disclosed. |
