Semiconductor optical logical device

Details Semiconductor optical logical device Semiconductor optical logical device

1982-12-06

1986-12-02

Davie, James W.

357 2, 357 17, 357 30, H01L 3112, A01L 3116

Patent

active

046268782

ABSTRACT:
A semiconductor optical logical device comprises two light-emitting elements (2a, 2b) formed on one main surface of a transparent substrate (1), and two light sensitive elements (3a, 3b) formed on the other main surface faced to the light emitting elements (2a, 2b), respectively. The two light sensitive elements (3a, 3b) are comprised of amorphous semiconductor and are electrically connected in series. On the other hand, the light-emitting elements (2a, 2b) are driven responsive to individual input signals, respectively. If and when two input signals are applied simultaneously, the two light-emitting elements (2a, 2b) emit light simultaneously, so that an output is obtained from the two light sensitive elements connected in series. If and when only one input signal is applied, no output is obtained. Thus, an optical logical product circuit is provided.

REFERENCES:
patent: 3748480 (1973-07-01), Coleman
patent: 3818451 (1974-06-01), Coleman
patent: 4001859 (1977-01-01), Miyoshi et al.
patent: 4069492 (1978-01-01), Pankove et al.
patent: 4281208 (1981-07-01), Kuwano et al.

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