Radiation protection circuit for protection against gamma ray an

Details Radiation protection circuit for protection against gamma ray an Radiation protection circuit for protection against gamma ray an

1987-04-24

1988-12-27

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

250214C, G02B 2700

Patent

active

047942614

ABSTRACT:
A circuit for protecting a protected circuit against radiation has a PIN diode series coupled to a laser, which is optically coupled to a photodiode. The photodiode is coupled to the protected circuit. When radiation occurs, the resistance of the PIN diode increases, which causes the laser to cease emitting light. In turn, the resistance of the photodiode increases, thereby decreasing the current from a power supply through the protected circuit.

REFERENCES:
patent: 3480781 (1969-11-01), Mandalakas
patent: 3539809 (1970-11-01), Lokerson
patent: 4045675 (1977-08-01), Kingsley et al.
A. B. Przedpelski, "PIN Diode Switches-Part II", R. F. Design, Feb. 1987, pp. 89 & 90.
A. Rosen et al., "High Powered Low-Loss PIN Diodes for Phased-Array Radar", RCA Review, Mar. 1979, vol. 40, No. 1, pp. 22-58.

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