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Title:
LIGHT RECEIVING CIRCUIT FOR OPTICAL FREE-SPACE TRANSMISSION
Document Type and Number:
Japanese Patent JPH10135746
Kind Code:
A
Abstract:

To provide the light receiving circuit for optical free-space transmission with an excellent S/N ratio characteristic without causing DC saturation under an external disturbance noise light including a DC component.

A current-voltage converter inverted amplifier 4 of a light receiving circuit is provided with a signal feedback section 11 that has a low impedance characteristic at a signal frequency band of a transmission object and a high impedance characteristic at a higher frequency band than the signal frequency band and with a DC feedback section 12 that has a low impedance characteristic at a lower frequency band than the signal frequency band so as to realize a high S/N without provision of a signal band-pass filter at a post-stage of the current-voltage converter inverted amplifier 4.


Inventors:
TACHIKI YOICHIRO
Application Number:
JP28890396A
Publication Date:
May 22, 1998
Filing Date:
October 31, 1996
Export Citation:
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Assignee:
SHARP KK
International Classes:
H03F3/08; H04B10/07; H04B10/11; H04B10/40; H04B10/50; H04B10/60; H04B10/69; (IPC1-7): H03F3/08; H04B10/04; H04B10/06; H04B10/14; H04B10/26; H04B10/28
Attorney, Agent or Firm:
Umeda Masaru