发明名称 |
Optical random access memory |
摘要 |
An electro optical random access memory uses a film of bacteriorhodopsin or similar photochromic substance which can change between two light absorbing states in response to light of each of two wavelengths. In one embodiment combined red and green laser beams are steered in two orthogonal directions to memory locations on the film. The relative amounts of the light of the two wavelength reflected from memory cell is sensed and discriminated to indicate "1" or "0". A crowbar circuit holds one or the other of the two laser beams on to compensate for degradation that occurs in a read cycle. In another embodiment a single wavelength is employed for read and write operations, but at a much greater strength for the write operation.
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申请公布号 |
US5228001(A) |
申请公布日期 |
1993.07.13 |
申请号 |
US19910644500 |
申请日期 |
1991.01.23 |
申请人 |
SYRACUSE UNIVERSITY |
发明人 |
BIRGE, ROBERT R.;LAWRENCE, ALBERT F. |
分类号 |
G11B7/0045;G11C13/04 |
主分类号 |
G11B7/0045 |
代理机构 |
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