Title :
256 bit parallel XOR gate operating with optical input and output
Author :
Matsuda, K. ; Adachi, H. ; Chino, T. ; Shibata, J.
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
Abstract :
An optical parallel XOR gate is proposed and demonstrated based on an optoelectronic bistable switch. The switch consists of a light emitting diode (LED) and a heterojunction phototransistor (HPT), and optical positive feedback from the LED to the HPT is the cause of bistability. A 256 bit parallel gate was fabricated and the XOR operation was implemented. The switch operated by a light pulse with a width of 10 nsec, and the switching energy was about 5 pJ. The switching speed was mainly limited by the response time of the HPT.<>
Keywords :
light emitting diodes; logic gates; optical bistability; optical logic; phototransistors; heterojunction phototransistor; light emitting diode; light pulse; optical input; optical logic gate; optical positive feedback; optoelectronic bistable switch; parallel XOR gate; response time; switching energy; switching speed; Delay; Heterojunctions; Light emitting diodes; Optical bistability; Optical feedback; Optical pulses; Optical switches; Phototransistors; Space vector pulse width modulation; Stimulated emission;
Conference_Titel :
Electron Devices Meeting, 1990. IEDM '90. Technical Digest., International
Conference_Location :
San Francisco, CA, USA
DOI :
10.1109/IEDM.1990.237107
