GB2229611A - Low power isolating data link with digital interface - Google Patents
Low power isolating data link with digital interface Download PDFInfo
- Publication number
- GB2229611A GB2229611A GB8904091A GB8904091A GB2229611A GB 2229611 A GB2229611 A GB 2229611A GB 8904091 A GB8904091 A GB 8904091A GB 8904091 A GB8904091 A GB 8904091A GB 2229611 A GB2229611 A GB 2229611A
- Authority
- GB
- United Kingdom
- Prior art keywords
- data link
- low power
- digital interface
- power isolating
- isolating data
- 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
- 239000013078 crystal Substances 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000013497 data interchange Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002889 sympathetic effect Effects 0.000 description 1
Classifications
-
- H04B5/24—
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/40—Piezoelectric or electrostrictive devices with electrical input and electrical output, e.g. functioning as transformers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
A data transfer system uses a piezo-electric crystal 2 flexed by a magnet or soft iron core 1 driven by a coil 5 and thus requiring no amplifier to interface to digital logic, (not shown). <IMAGE>
Description
DESCRIPTION
LOW POWER ISOLATING DATA LINK WITH
DIGITAL INTERFACE
This invention relates to a means of constructing a data link which gives isolation between the two halves of the link, uses little or no power and generates a signal which can be applied direct to a digital input of a logic circuit.
Inductive data links using inductive coupling are well known but suffer from the disadvantage of requiring amplifiers to boost the inherently low signal level to a suitable level to interface to digital circuitry.
According to the present invention it is possible to have an inductive coupling without any requirement for amplification before application to a digital input.
A specific embodiment will now be described with reference to the accompanying drawing.
Figure 1 shows a data link comprising a piezo-crystal with attached magnet coupling to an induction coil, shown in cross section.
Referring to Figure 1 a bar magnet (1) is attached to the centre of a piezo-crystal (2) supported so that any movement of the magnet (1) causes flexing of the crystal (2). The crystal (2) has electrical contacts to its front and rear faces. For the purpose of data interchange a donor housing (3) is slid into a receptacle housing (4) so that a coil (5) surrounds the bar magnet (1). Energisation of the coil (5) by a current will cause sympathetic movement of the bar magnet (1) which will cause flexing of the crystal (2) which will generate a voltage differential across its front and rear faces. In some applications a soft iron core could be preferable to a bar magnet.
The voltage thus generated is of a high magnitude and will preferably require diode limiting before being applied to a shmitt input. An ideal logic family for the purpose would be
CMOS type, which exhibits a high input impedance. Such detail will be understood to those practised in the art.
Claims (1)
1. A data transfer system based upon the flexing of a piezo
electric crystal by a magnet or soft iron core caused to move
by a magnetic field induced within a coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8904091A GB2229611B (en) | 1989-02-23 | 1989-02-23 | Low power isolating data link with digital interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8904091A GB2229611B (en) | 1989-02-23 | 1989-02-23 | Low power isolating data link with digital interface |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8904091D0 GB8904091D0 (en) | 1989-04-05 |
| GB2229611A true GB2229611A (en) | 1990-09-26 |
| GB2229611B GB2229611B (en) | 1993-04-07 |
Family
ID=10652157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8904091A Expired - Fee Related GB2229611B (en) | 1989-02-23 | 1989-02-23 | Low power isolating data link with digital interface |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2229611B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1470466A (en) * | 1975-01-30 | 1977-04-14 | Itt Creed | Isolating input circuit for telegraphic receiving equipment |
| EP0260238A2 (en) * | 1986-09-11 | 1988-03-16 | Bengt Henoch | Device for transmitting electric energy to computers and data nets |
-
1989
- 1989-02-23 GB GB8904091A patent/GB2229611B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1470466A (en) * | 1975-01-30 | 1977-04-14 | Itt Creed | Isolating input circuit for telegraphic receiving equipment |
| EP0260238A2 (en) * | 1986-09-11 | 1988-03-16 | Bengt Henoch | Device for transmitting electric energy to computers and data nets |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2229611B (en) | 1993-04-07 |
| GB8904091D0 (en) | 1989-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950223 |