JPS6419806A - Modulating method - Google Patents
Modulating methodInfo
- 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
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.
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)
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)
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 |
-
1987
- 1987-07-15 JP JP17477087A patent/JPS6419806A/en active Granted
Patent Citations (6)
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 |
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