JPS6419806A - Modulating method - Google Patents

Modulating method

Info

Publication number
JPS6419806A
JPS6419806A JP17477087A JP17477087A JPS6419806A JP S6419806 A JPS6419806 A JP S6419806A JP 17477087 A JP17477087 A JP 17477087A JP 17477087 A JP17477087 A JP 17477087A JP S6419806 A JPS6419806 A JP S6419806A
Authority
JP
Japan
Prior art keywords
coil
card
electromagnetic field
modulated
amplitude
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
JP17477087A
Other languages
Japanese (ja)
Other versions
JPH053164B2 (en
Inventor
Kunitaka Arimura
Kunio Igai
Yasumasa Kobayashi
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.)
Arimura Giken KK
Original Assignee
Arimura Giken KK
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 Arimura Giken KK filed Critical Arimura Giken KK
Priority to JP17477087A priority Critical patent/JPS6419806A/en
Publication of JPS6419806A publication Critical patent/JPS6419806A/en
Publication of JPH053164B2 publication Critical patent/JPH053164B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Amplitude Modulation (AREA)

Abstract

PURPOSE:To obtain the simple modulated wave of a modulating circuit by modulating so as to alternately situate the carrier part of a constant amplitude, an amplitude modulated part (AM) part and an amplitude deviation modulated part (ASK) part in time. CONSTITUTION:In an external equipment, the modulated wave on which data is mounted is supplied to the coil of L1. An induction electromagnetic field is formed by a current passing through this coil L1. In a card side, this electromagnetic field is received by a coil L2 to obtain these power and information. In order to obtain the power in the card side, an alternating current voltage induced to the L2 coil by the induction electromagnetic field is fed to a rectifying circuit to rectify and supplied to the respective circuits in the card as a direct current. The data received from the external equipment by the card is obtained by detecting a voltage induced in the coil L2 and inputting it to a comparator to have a digital signal.
JP17477087A 1987-07-15 1987-07-15 Modulating method Granted JPS6419806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17477087A JPS6419806A (en) 1987-07-15 1987-07-15 Modulating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17477087A JPS6419806A (en) 1987-07-15 1987-07-15 Modulating method

Publications (2)

Publication Number Publication Date
JPS6419806A true JPS6419806A (en) 1989-01-23
JPH053164B2 JPH053164B2 (en) 1993-01-14

Family

ID=15984366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17477087A Granted JPS6419806A (en) 1987-07-15 1987-07-15 Modulating method

Country Status (1)

Country Link
JP (1) JPS6419806A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4560744B2 (en) * 2008-03-18 2010-10-13 ソニー株式会社 COMMUNICATION SYSTEM, COMMUNICATION METHOD, DATA PROCESSING DEVICE, AND DATA PROCESSING METHOD

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010906A (en) * 1973-05-28 1975-02-04
US3944928A (en) * 1974-07-01 1976-03-16 Microlab/Fxr Harmonic communication system
JPS52150937A (en) * 1976-06-09 1977-12-15 Matsushita Electric Ind Co Ltd Data card and its reading system
JPS56158556A (en) * 1980-05-13 1981-12-07 Canon Inc Digital communication system
JPS60153589A (en) * 1983-12-06 1985-08-13 マース，インコーポレーテツド Substitute currency and substitute currency handler
JPS62169292A (en) * 1986-01-13 1987-07-25 アボツト　ラボラトリ−ズ Apparatus and method for storing, transmitting and fetching electronic data

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010906A (en) * 1973-05-28 1975-02-04
US3944928A (en) * 1974-07-01 1976-03-16 Microlab/Fxr Harmonic communication system
JPS52150937A (en) * 1976-06-09 1977-12-15 Matsushita Electric Ind Co Ltd Data card and its reading system
JPS56158556A (en) * 1980-05-13 1981-12-07 Canon Inc Digital communication system
JPS60153589A (en) * 1983-12-06 1985-08-13 マース，インコーポレーテツド Substitute currency and substitute currency handler
JPS62169292A (en) * 1986-01-13 1987-07-25 アボツト　ラボラトリ−ズ Apparatus and method for storing, transmitting and fetching electronic data

Also Published As

Publication number Publication date
JPH053164B2 (en) 1993-01-14

Similar Documents

Publication Publication Date Title
US3689885A (en) Inductively coupled passive responder and interrogator unit having multidimension electromagnetic field capabilities
US6094173A (en) Method and apparatus for detecting an RFID tag signal
US5095309A (en) Method and apparatus for modulating and detecting a subcarrier signal for an inductively coupled transponder
US5570086A (en) Data carrier system
ATE171323T1 (en) DEVICE FOR TRANSMITTING ELECTRICAL ENERGY AND DATA SIGNALS
ES8900072A1 (en) Transaction system.
GB2197107B (en) Data-storing devices
JPS643787A (en) Electronic data communication system
JPS6446675A (en) Apparatus for non-contact data exchange
JPH0690743B2 (en) IC card processing device and IC card
US5198807A (en) Method and apparatus for producing a subcarrier signal for transmission by an inductively coupled transponder
ATE173103T1 (en) SYSTEM AND METHOD FOR CONTACTLESS DATA TRANSMISSION
US3182315A (en) Interrogator-responder signalling system
JPS6419806A (en) Modulating method
DE68916879D1 (en) System for the mutual transfer of information between a portable object, in particular a key, and another data carrier.
DE59706626D1 (en) DATA TRANSFER CIRCUIT WITH A STATION AND WITH AN ANSWER CIRCUIT
JPS58151722A (en) Data transmitter containing no carrier oscillator
US5877706A (en) Ferromagnetic object detector
GB2187916A (en) Transponder presence indicator
JPS57132459A (en) Insulation system
ATE21198T1 (en) DEVICE FOR THE INDUCTIVE TRANSMISSION AND EVALUATION OF SIGNALS FROM A MOVABLE DEVICE TO AN EVALUATION CENTER.
EP2154791B1 (en) Method and system for inductively transmitting energy and information
JPS6481086A (en) Non-contact type magnetic coupling transmitting and receiving system
JPS6419490A (en) Collating device
JP3006784B2 (en) Mobile station identification device by radio