Title:
ELECTRIC CIRCUIT
Document Type and Number:
Japanese Patent JPS60121834
Kind Code:
A
Abstract:
In a system for transmitting two level data bursts on a fiber optic (FO) bus, a circuit for turning on a light emitting diode to an excitation level induced by a current IB corresponding to the knee of the diode characteristic curve and increasing the emitted light in response to a second increasing excitation current over a second portion of the curve beyond the knee extending from excitation level IB to excitation level IM. The circuit includes first logic for exciting the diode by the first current, a light responsive device for determining when the emitted light reaches the intensity represented by the knee of the curve and induced by IB, and logic for reproducibly storing IB. Second logic responds to the excitation of the diode to the knee of its curve to further excite the diode with the second excitation current until the diode emits a desired light intensity induced by IB+IM. Logic is provided for reproducibly storing a signal IM. Switching logic supplies the current IM to the diode in response to the data bursts and supplies I B to the diode substantially concurrently with the data bursts. In the absence of the data bursts the current level IB is reduced to substantially zero.
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Inventors:
SUTEFUAN AREN SHIIGERU
DEEBITSUDO ROSU PATAASON
DONARUDO JIYOONZU CHIYANIN
JIYOJIFU BONABENCHIYA SAAJI JI
JIEFUREI POORU BAIOURA
DEEBITSUDO ROSU PATAASON
DONARUDO JIYOONZU CHIYANIN
JIYOJIFU BONABENCHIYA SAAJI JI
JIEFUREI POORU BAIOURA
Application Number:
JP19775684A
Publication Date:
June 29, 1985
Filing Date:
September 19, 1984
Export Citation:
Assignee:
RCA CORP
International Classes:
H04B10/60; H04B10/00; H04B10/07; H04B10/29; H04B10/40; H04B10/43; H04B10/50; H04B10/564; (IPC1-7): H04B9/00
Attorney, Agent or Firm:
Tokunji Ikunuma