Enhancement of contrast ratio in pattern edge extraction by using voltage-controlled negative load resistors

Authors :: K. Mitsunaga
Keisuke Kojima
K. Hara
Kazuo Kyuma
Source :: IEEE Photonics Technology Letters. 3:852-855
Publication Year :: 1991
Publisher :: Institute of Electrical and Electronics Engineers (IEEE), 1991.
Abstract: Parallel-connected pn-pn optical switches can be used to realize pattern edge extraction. The authors describe a method of enhancing the on-edge/off-edge contrast ratio using voltage-controlled negative load resistors. Negative resistance can suppress the currents injected into the off-edge elements. In an experiment with the negative resistors based on serial-connected thyristors, a contrast ratio as high as 16:1 was obtained. >

Subjects :: Imagination
Materials science
Chemical substance
business.industry
media_common.quotation_subject
Negative resistance
Thyristor
Optical switch
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
law.invention
law
Optoelectronics
Contrast ratio
Electrical and Electronic Engineering
Resistor
business
media_common
Voltage

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