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Patent Searching and Data


Title:
TRANSMITTER FOR DIGITAL SIGNAL
Document Type and Number:
Japanese Patent JPS5817743
Kind Code:
A
Abstract:

PURPOSE: To improve substantial signal transmission speed, by using a frequency shift modulation wave with different channel number, and transmitting one digital signal on the same transmission path at the same time.

CONSTITUTION: An output of frequency shift modulators 110 and 111 is both transmitted with a transmission line 31, a frequency shift demodulator 240 receives frequencies f0 and f1 for demodulation, and a frequency shift demodulator 241 receives frequencies f0 and f1 for demodulation. A serial parallel converter 250 modulates an output of the demdoulator 240 into a parallel signal and a serial parallel converter 251 converts the output of the demodulator 241 into a parallel signal. Thus, the output of the converter 250, the output of the converters 120 and 251 and the code of the converter 121 are respectively equal. When the output of the converters 250 and 251 are arranged overlappingly, the code is the same as that of an A/D converter 13 and the code is converted into a D/A converter 26. Thus, since the transmission line is operated in parallel, the amount of information transmitted for a specified time can by doubled for a prescribed bit.


Inventors:
SEKI TOSHIMICHI
Application Number:
JP11613081A
Publication Date:
February 02, 1983
Filing Date:
July 23, 1981
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H04J1/16; H04J4/00; H04L27/10; (IPC1-7): H04L27/10
Attorney, Agent or Firm:
Shinichi Kusano