| 摘要 |
An induced pulse diversion circuit (12) senses the presence of pulses in an input signal, particularly beta and gamma pulses induced into the photocurrent input to a focal plane readout unit cell (50), and diverts them from a main signal path (14) to a diversion path (16). A pair of gate devices (18,20) control access to the signal and diversion paths, respectively. An inverting amplifier (30) receives the incoming photocurrent and, upon receipt of an induced pulse, produces an output that turns on the diversion path's gate device (20) and turns off the signal path's gate device (18). The invention reduces the occurrence of "toggling" by limiting the negative-going excursions of the inverting amplifier made in response to an induced pulse, so that the amplifier is prevented from being driven into saturation. The relatively few components needed to implement the invention fit within the area allotted to an integrated unit cell, arrays of which are integrated together to form a focal plane array.
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