JPS5778235A - Wireless transmission device - Google Patents

Wireless transmission device

Info

Publication number
JPS5778235A
JPS5778235A JP55154263A JP15426380A JPS5778235A JP S5778235 A JPS5778235 A JP S5778235A JP 55154263 A JP55154263 A JP 55154263A JP 15426380 A JP15426380 A JP 15426380A JP S5778235 A JPS5778235 A JP S5778235A
Authority
JP
Japan
Prior art keywords
outputs
amplifiers
coils
noise
output
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.)
Granted
Application number
JP55154263A
Other languages
Japanese (ja)
Other versions
JPS6366460B2 (en
Inventor
Toshiyuki Goto
Takashi Matsumoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55154263A priority Critical patent/JPS5778235A/en
Publication of JPS5778235A publication Critical patent/JPS5778235A/en
Publication of JPS6366460B2 publication Critical patent/JPS6366460B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To cancel the noise and the magnitude and to obtain desired signal components with a simple constitution, by adding or subtracting outputs of amplifiers in accordance with the output of a phase comparator. CONSTITUTION:Coils 3 and 4 for transmission are connected in series between output terminals of an amplifier 2. Coils 5 and 6 for detection are arranged orthogonally to each other, and outputs induced by coils 5 and 6 are sent to amplifiers GX and GY. Noise components in outputs pass through a comparator 11 which compares phases, and outputs of amplifiers 7 and 8 are subtracted in case of the same phase, and they are added in case of phases opposite to each other. Thus, the noise and the magnitude of an output K0 of the system are cancelled even if they are changed, and desired signal components are obtained.
JP55154263A 1980-10-31 1980-10-31 Wireless transmission device Granted JPS5778235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55154263A JPS5778235A (en) 1980-10-31 1980-10-31 Wireless transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55154263A JPS5778235A (en) 1980-10-31 1980-10-31 Wireless transmission device

Publications (2)

Publication Number Publication Date
JPS5778235A true JPS5778235A (en) 1982-05-15
JPS6366460B2 JPS6366460B2 (en) 1988-12-20

Family

ID=15580356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55154263A Granted JPS5778235A (en) 1980-10-31 1980-10-31 Wireless transmission device

Country Status (1)

Country Link
JP (1) JPS5778235A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603098A1 (en) * 1985-02-03 1987-01-08 Svaetopluk Radakovic A device having a number of receiving coils for avoiding a loss of reception due to the directional patterns of the transmitting and receiving coil in a signal transmission with magnetic field
JPH0461430A (en) * 1990-06-29 1992-02-27 Nippon Koden Corp Receiver for magnetic field short distance communication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603098A1 (en) * 1985-02-03 1987-01-08 Svaetopluk Radakovic A device having a number of receiving coils for avoiding a loss of reception due to the directional patterns of the transmitting and receiving coil in a signal transmission with magnetic field
JPH0461430A (en) * 1990-06-29 1992-02-27 Nippon Koden Corp Receiver for magnetic field short distance communication

Also Published As

Publication number Publication date
JPS6366460B2 (en) 1988-12-20

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