JPS56132034A - Noise preventing circuit of car-mounted digital device - Google Patents

Noise preventing circuit of car-mounted digital device

Info

Publication number
JPS56132034A
JPS56132034A JP3402080A JP3402080A JPS56132034A JP S56132034 A JPS56132034 A JP S56132034A JP 3402080 A JP3402080 A JP 3402080A JP 3402080 A JP3402080 A JP 3402080A JP S56132034 A JPS56132034 A JP S56132034A
Authority
JP
Japan
Prior art keywords
car
line
digital device
signal lines
earth
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
JP3402080A
Other languages
Japanese (ja)
Inventor
Iwao Imai
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP3402080A priority Critical patent/JPS56132034A/en
Publication of JPS56132034A publication Critical patent/JPS56132034A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
    • H04L25/085—Arrangements for reducing interference in line transmission systems, e.g. by differential transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To prevent the noise which gives receiving interference car-mounted audio devices such as a radio and a communicator, by providing the earth line, which becomes the reflux line of I/O signal lines, and the earth line of the low-pass filter independently of each other. CONSTITUTION:Sensor groups or actuator grups 71-79 having earth point G in engine block 70 are connected to the metalic case where the car-mounted digital device is stored, and low-pass filter group 90 is inserted for the purpose of preventing clock pulses, which are used by the car-mounted digital device, from leaking to I/O signal lines 41-49 to give interference to the car-mounted radio. Earth line 81 of low-pass filter group 90 is provided independently of earth line 80 of I/O signal lines 41-49, and line 81 is grounded through the metallic case of filter at fixed point M on the vehicle body, thereby obtaining the by-pass effect of the high- frequency noise current of filters sufficiently.
JP3402080A 1980-03-19 1980-03-19 Noise preventing circuit of car-mounted digital device Pending JPS56132034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3402080A JPS56132034A (en) 1980-03-19 1980-03-19 Noise preventing circuit of car-mounted digital device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3402080A JPS56132034A (en) 1980-03-19 1980-03-19 Noise preventing circuit of car-mounted digital device

Publications (1)

Publication Number Publication Date
JPS56132034A true JPS56132034A (en) 1981-10-16

Family

ID=12402695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3402080A Pending JPS56132034A (en) 1980-03-19 1980-03-19 Noise preventing circuit of car-mounted digital device

Country Status (1)

Country Link
JP (1) JPS56132034A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994010770A1 (en) * 1992-10-29 1994-05-11 Dae Sung Hi-Tech Co., Ltd. Communication cable for connecting computer and monitor, for purpose of reducing electromagnetic interfering noise

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994010770A1 (en) * 1992-10-29 1994-05-11 Dae Sung Hi-Tech Co., Ltd. Communication cable for connecting computer and monitor, for purpose of reducing electromagnetic interfering noise
US5656872A (en) * 1992-10-29 1997-08-12 Dae Sung Hi-Tech Co., Ltd. Communication cable for reducing electromagnetic wave interference and for use in connecting a computer main body with a monitor

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