The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 1994
Filed:
May. 26, 1992
Applicant:
Inventor:
Osamu Kinoshita, Kawasaki, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
359189 ; 359194 ; 307355 ; 307360 ; 307362 ; 307354 ; 375 76 ;
Abstract
According to an optical receiver of the present invention, an optical input signal is converted to an electric signal by a photoelectric element, and amplified by an amplifier. Thereafter, a band frequency is restricted by a low pass filter, and a peak value of a bottom level of the band-restricted pulse signal is detected. Then, an offset voltage is added to the detected value, thereby a compare reference value is generated. The output of the amplifier is compared with the compare reference voltage by a comparator, thereby data is discriminated.