Title:
PHOTOELECTRIC CONVERSION SYSTEM
Document Type and Number:
Japanese Patent JPH04282876
Kind Code:
A
Abstract:
PURPOSE:To extract only a signal by distinguishing a background wave from a signal wave, permit a signal/noise ratio to be large and suppress noise caused by the stroke of other circuit and a power source line. CONSTITUTION:The system is provided with a light projecting means which converts an electric signal into an optical signal and emits only the optical signal, a light receiving means which receives an optical signal and converts it into an electric signal. The light projecting means is composed of a light emitting element 1, a transistor 8 which drives the element 1 and a light emitting element driving circuit which modulates the energy waveform of the optical signal emitted from the light emitting element 1 to be a sine waveform. The transistor 8 which drives the light emitting element 1 is permitted to operate only in an active area.
Inventors:
SHINOMIYA KOJI
Application Number:
JP7246491A
Publication Date:
October 07, 1992
Filing Date:
March 11, 1991
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H01L31/12; H01L33/00; (IPC1-7): H01L31/12; H01L33/00
Attorney, Agent or Firm:
Kenichi Hayase
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