WO1988002171A3 - Remote accessible memory devices - Google Patents
Remote accessible memory devices Download PDFInfo
- Publication number
- WO1988002171A3 WO1988002171A3 PCT/GB1987/000669 GB8700669W WO8802171A3 WO 1988002171 A3 WO1988002171 A3 WO 1988002171A3 GB 8700669 W GB8700669 W GB 8700669W WO 8802171 A3 WO8802171 A3 WO 8802171A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- memory device
- data
- circuits
- electric field
- products
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
Abstract
A remotely accessible data storage device such as an integrated circuit memory (memory device) is accessed by means of a single channel electric field coupling transmitter/receiver arrangement in which digital data and clock signals for said memory device are modulated with high frequency carrier oscillations of opposite polarity and multiplexed for transmission by said single channel electric field coupling and demodulated and demultiplexed into separate data and clock signals for supply to said memory device. Power for demodulation, demultiplexing and memory device circuits may be derived from a rectification of either clock or data signals so that these circuits may be normally passive, very small, and located on a variety of products, independently of the transmitter circuits, to provide, e.g., a refresherable audit trail of said products. The invention has particular application to the recording of drill bit usage data on the drill bits themselves.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB868622792A GB8622792D0 (en) | 1986-09-22 | 1986-09-22 | Remote memory device |
| GB8622792 | 1986-09-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1988002171A2 WO1988002171A2 (en) | 1988-03-24 |
| WO1988002171A3 true WO1988002171A3 (en) | 1989-02-23 |
Family
ID=10604590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1987/000669 WO1988002171A2 (en) | 1986-09-22 | 1987-09-22 | Remote accessible memory devices |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0282559A1 (en) |
| JP (1) | JPH02500061A (en) |
| GB (1) | GB8622792D0 (en) |
| WO (1) | WO1988002171A2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665474A (en) * | 1966-08-19 | 1972-05-23 | Amscat Corp | High density communications system |
| EP0055639A1 (en) * | 1980-11-26 | 1982-07-07 | Dominique Saulnier | System for transmitting information to a passive programmable tranducer for dynamic encoding |
| EP0103730A2 (en) * | 1982-09-16 | 1984-03-28 | Robert Bosch Gmbh | Coding system for the registration of information on workpiece holders or the like |
-
1986
- 1986-09-22 GB GB868622792A patent/GB8622792D0/en active Pending
-
1987
- 1987-09-22 JP JP50574587A patent/JPH02500061A/en active Pending
- 1987-09-22 EP EP19870906299 patent/EP0282559A1/en not_active Withdrawn
- 1987-09-22 WO PCT/GB1987/000669 patent/WO1988002171A2/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665474A (en) * | 1966-08-19 | 1972-05-23 | Amscat Corp | High density communications system |
| EP0055639A1 (en) * | 1980-11-26 | 1982-07-07 | Dominique Saulnier | System for transmitting information to a passive programmable tranducer for dynamic encoding |
| EP0103730A2 (en) * | 1982-09-16 | 1984-03-28 | Robert Bosch Gmbh | Coding system for the registration of information on workpiece holders or the like |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8622792D0 (en) | 1986-10-29 |
| JPH02500061A (en) | 1990-01-11 |
| EP0282559A1 (en) | 1988-09-21 |
| WO1988002171A2 (en) | 1988-03-24 |
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