Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1989-05-15
1990-04-10
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250211J, H01J 4014
Patent
active
049163035
ABSTRACT:
An electron beam controlled semiconductor switch is capable of carrying large currents without being restricted by the space charge limited current condition. The switch includes a block of semiconductor material having ohmic contacts connectable to first and second electrical conductors. Semi-insulating GaAs may be used as the semiconductor material. A shallow donor or acceptor doped layer may be formed at the surface receiving the electron beam for increased band-edge radiation. This recombination radiation ionizes, together with X-rays produced by Bremsstrahlung, the bulk of the semiconductor block to provide relatively high current density and current gain.
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Brinkmann Ralf P.
Gerdin Glenn A.
Lakdawala Vishnukumar K.
Schoenbach Karl H.
Allen Stephone B.
Center For Innovative Technology
Nelms David C.
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