Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1987-04-07
1988-06-28
Edlow, Martin H.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
357 58, 357 46, 250370, 350 9611, 307355, H01L 2714, H01L 2912, H01L 2702
Patent
active
047543124
ABSTRACT:
This invention is directed to a three-terminal semiconductor device which acts as a differential light detector. It is based on the operation of two reverse biased PIN photodetectors where one receives light through its P-doped surface and the other through its N-doped surface. The device is configured to be compatible with applications in integrated optics and with fiber optics. In principle of operation the invention relies on the production and collection of electrons from the detection of a first light intensity and the production and collection of holes from the detection of the intensity of a second light. This is done in a connected or integrated semiconductor which allows the recombination of electrons and holes. The excess number of electrons or holes, depending upon which light is received with the greatest intensity, is extracted from the recombination region and is the basis for the output signal.
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patent: 4591892 (1986-05-01), Yamazaki
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Ezis Andris
Langer Dietrich W.
Edlow Martin H.
Featherstone Donald J.
Franz Bernard E.
Singer Donald J.
The United States of America as represented by the Secretary of
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