Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2007-01-11
2009-02-24
Sohn, Seung C (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S206200, C250S208200, C250S370100, C348S311000, C348S312000
Reexamination Certificate
active
07495201
ABSTRACT:
A charge multiplexed position sensing apparatus and method for measuring an incident radiation with the aid of an array of solid-state photosensitive detectors such as an array of avalanche photodiodes (APDs). The solid-state photosensitive detectors multiplex sum terminal(s) and a number of correspondent spatial terminals separately. Sum signal busses are provided to establish separate connections to the sum terminals of each solid-state photosensitive detector. Spatial signal busses interconnect correspondent spatial terminals of all of the solid-state photosensitive detectors such that correspondent spatial terminals are all connected to the same spatial signal bus. The multiplexing circuit triggers on electrical signals corresponding to sum or total voltages generated by the incident radiation.
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Levin Craig S.
Olcott Peter D.
Lument Patent Firm
Sohn Seung C
The Board of Trustees of the Leland Stanford Junior University
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