Patent ID: 11894670
Assignee: RAYTHEON COMPANY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 6:
7. An apparatus comprising:
a photodetector configured to generate an electrical current based on received illumination;
an integration capacitor configured to integrate the electrical current and generate an integrator voltage;
an amplifier configured to control a transistor switch coupled in series between the photodetector and the integration capacitor;
an event detector configured to sense a high-energy event affecting the photodetector; and
a switchable clamp coupled across inputs of the amplifier, the event detector configured to close the switchable clamp in response to sensing the high-energy event;
wherein the event detector is configured to close the switchable clamp in order to maintain a desired reverse bias voltage on the photodetector during the high-energy event.