GB1229481A - - Google Patents
Info
- Publication number
- GB1229481A GB1229481A GB1229481DA GB1229481A GB 1229481 A GB1229481 A GB 1229481A GB 1229481D A GB1229481D A GB 1229481DA GB 1229481 A GB1229481 A GB 1229481A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- diode
- field
- temperature
- amplifier
- 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.)
- Expired
Links
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 abstract 2
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- KAPYVWKEUSXLKC-UHFFFAOYSA-N [Sb].[Au] Chemical compound [Sb].[Au] KAPYVWKEUSXLKC-UHFFFAOYSA-N 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 238000009713 electroplating Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 238000005476 soldering Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Ceramic Engineering (AREA)
- Computer Hardware Design (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
1,229,481. Temperature compensation of magnetic sensor. NEWPORT INSTRUMENTS Ltd. March 5, 1969 [March 5, 1968], No.10738/68. Heading G1N. [Also in Division H1] The magnetically sensitive negative resistance diode shown has an n-type germanium wafer (18) with (100) major faces bonded to a brass heat sink (12) forming one end of a casing. The diode has both its contacts on the same face. The magnetic sensitivity arises mainly from a contact constituted by a gold-antimony wire (22) (reinforced with a silver coating (24) over most of its length) which has been screwed into contact with the wafer and pulse-bonded thereto. As essentially ohmic contact is formed by electro-plating a copper annulus concentric to the point contact and soldering a wire (26) thereto. The diode may be used for magnetic field sensing or measurement and may be used, under reverse-bias, in constant current or constant voltage modes. The diode is temperature sensitive: temperature compensation may be achieved in the constant voltage mode by applying the constant voltage to a combination of the diode and a suitable resistor, and in the constant current mode by taking the difference signal from two suitably chosen orthogonally mounted diodes, on parallel to and the other perpendicular to the applied field. A circuit is described for effecting temperature compensation of a single diode 54 operated in the constant current mode. Both the zero-field voltage and the slope of the field-voltage characteristic are temperature dependent. The zero-field voltage (which varies approximately logarithmically with temperature) is cancelled in difference amplifier 63 by a signal derived from a thermistor 56 fed by a bridge 61 and amplifier 53 to a diode 52 biased to a suitable part of its characteristic and then to an amplifier 60 where it is subtracted from a constant voltage. The corrected voltage V o from the amplifier 63 is fed as the input to a bridge one arm of which contains a second thermistor, 68, of linear or non-linear characteristics depending on the temperature range to be covered by the compensator; the output of the bridge is a signal corrected for temperature variation of both zero-field voltage and slope of the field-voltage characteristic.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1073868 | 1968-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1229481A true GB1229481A (en) | 1971-04-21 |
Family
ID=9973384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1229481D Expired GB1229481A (en) | 1968-03-05 | 1968-03-05 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1229481A (en) |
-
1968
- 1968-03-05 GB GB1229481D patent/GB1229481A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |