JPS5496311A - Data serial transmission system - Google Patents

Data serial transmission system

Info

Publication number
JPS5496311A
JPS5496311A JP236678A JP236678A JPS5496311A JP S5496311 A JPS5496311 A JP S5496311A JP 236678 A JP236678 A JP 236678A JP 236678 A JP236678 A JP 236678A JP S5496311 A JPS5496311 A JP S5496311A
Authority
JP
Japan
Prior art keywords
data
output
bit
units
generated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP236678A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kimura
Isao Fukushima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP236678A priority Critical patent/JPS5496311A/en
Publication of JPS5496311A publication Critical patent/JPS5496311A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/12—Modulator circuits; Transmitter circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To ensure an assured and error-free transmission of the data at all times with use of no clock and by securing the equal wave number for each frequency of the FSK signals corredponding to each bit of the transfer data. CONSTITUTION:Data ''101'' of input 10 is memorized in shift register 5, and output voltage h corresponding to first ''1'' is applied to VCO6 to generate output k1 of the frequency at time t1. Signal k1 is then transimtted to the antenna and others via switch 11 as well as to counter 7. thus, output pulse i is generated with counting (7) of four units of the wave of signal k1, and register 5 is shifted by one bit. Then output h is generated corresponding to ''0'' and ''1'' at time t2 and t3. Thus, three units of pulse i are produced from t1 to t3 to be counted by counter 8, and thus output j is generated to open switch 11. As a result, the transfer is completed at t3 for 3-bit data ''101''. In this case, FSK signal k is formed with the waves of the same number with every data bit (four units of the wave in this instance).
JP236678A 1978-01-14 1978-01-14 Data serial transmission system Pending JPS5496311A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP236678A JPS5496311A (en) 1978-01-14 1978-01-14 Data serial transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP236678A JPS5496311A (en) 1978-01-14 1978-01-14 Data serial transmission system

Publications (1)

Publication Number Publication Date
JPS5496311A true JPS5496311A (en) 1979-07-30

Family

ID=11527252

Family Applications (1)

Application Number Title Priority Date Filing Date
JP236678A Pending JPS5496311A (en) 1978-01-14 1978-01-14 Data serial transmission system

Country Status (1)

Country Link
JP (1) JPS5496311A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62141836A (en) * 1985-12-16 1987-06-25 Ayao Miura Information transmission system using pulse wave having multifrequency value
JPS62188063A (en) * 1986-01-24 1987-08-17 Ayao Miura Magnetic recording system
JPS62196906A (en) * 1986-02-25 1987-08-31 Ayao Miura Frequency modulator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62141836A (en) * 1985-12-16 1987-06-25 Ayao Miura Information transmission system using pulse wave having multifrequency value
JPS62188063A (en) * 1986-01-24 1987-08-17 Ayao Miura Magnetic recording system
JPS62196906A (en) * 1986-02-25 1987-08-31 Ayao Miura Frequency modulator

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