收藏本站
Application Notes
GMR Magnetic Field Sensors (Magnetometers)
The NVE standard line of magnetic field sensors use a unique configuration employing a Wheatstone
bridge of resistors and various forms of flux shields and concentrators. Using magnetic materials for
shielding eliminates the need for a bias field with GMR sensors. NVE has developed a process to
plates a thick layer of magnetic material on the sensor substrate. This layer forms a shield over the
GMR resistors underneath, essentially conducting any applied magnetic field away from the shielded
resistors. The configuration allows two resistors (opposite legs of the bridge) to be exposed to the
magnetic field. The other two resistors are located under the plated magnetic material, effectively
shielding them from the external applied magnetic field. When the external field is applied, the
exposed resistors decrease in electrical resistance while the other resistor pair remain unchanged,
causing a signal output at the bridge terminals.
The plating process developed by NVE for use in GMR sensor applications has another benefit: it
allows flux concentrators to be deposited on the substrate. These flux concentrators increase the
sensitivity of the raw GMR material by a factor of 2 to 100. The flux concentration factor is roughly
equivalent to the length of one shield divided by the length of the gap. This allows use of GMR
materials that saturate at higher fields. For example, to sense a field from 0 to 100 Oersteds, NVE
deposits a GMR sensor that saturates at a nominal 300 Oersteds and flux concentrators with a
magnification factor of three. The figure below shows the basic layout of the device:
Axis of sensitivity
Silicon substrate
(1300 μ m x 400 μ m)
Gap
Flux concentrator (2)
Metal interconnects
Magnetically shielded resistor (2)
Bonding pads (4)
(100 μ m x 100 μ m)
Magnetically active resistor pair
T YPICAL GMR M AGNETIC F IELD S ENSOR L AYOUT
- 94 -
www.nve.com phone: 952-829-9217 fax: 952-829-9189
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
123-5863-12-163 LED BASE MINI PNL IND OIL TIGHT
1230-100A-3L SENSOR PRES 100PSIA 0-50MV 8-DIP
124-1363-01-113 LED BASE PMI 11/16" SCREW TERM
1240-015D-3L SENSOR PRES 15PSID 0-50MV 8-DIP
125-1191-403 RED STOVEPIPE PMI CAP
125-1308-11-143 LED BASE PANEL OIL TIGHT T-3 1/4
125-1310-11-103 LED BASE PANEL OIL TIGHT T-3 1/4
125-5763-11-113 LED BASE PMI 11/16" QUICK CONN
相关代理商/技术参数
12-216 制造商:GC Electronics 功能描述:NEEDLE NOSE PLIERS; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No ;RoHS Compliant: No 制造商:GC Electronics 功能描述:Needle Nose Pliers
122160 功能描述:RF 连接器 TNC ST BULKHEAD JACK 58-303 LMR195 RoHS:否 制造商:Bomar Interconnect 产品:Connectors 射频系列:BNC 型式:Jack (Female) 极性: 触点电镀:Gold 阻抗: 端接类型:Solder 主体类型:Straight Bulkhead 电缆类型:
12-2160 制造商:GC Electronics 功能描述:REPLACEMENT TIP FOR 12-2157 制造商:GC Electronics 功能描述:TOOLS, DESOLDERING; For Use With:12-2157 Soldering Iron ;RoHS Compliant: Yes 制造商:GC Electronics 功能描述:Replacement Tips For 12-2157
1221-6001 功能描述:RF 连接器 SMP FML FLOAT MNT S/R .047 .093 PNL RoHS:否 制造商:Bomar Interconnect 产品:Connectors 射频系列:BNC 型式:Jack (Female) 极性: 触点电镀:Gold 阻抗: 端接类型:Solder 主体类型:Straight Bulkhead 电缆类型:
122160-11 功能描述:TNC Connector Jack, Female Socket 50 Ohm Panel Mount, Bulkhead - Front Side Nut Solder 制造商:amphenol-rf division 系列:- 包装:散装 零件状态:有效 连接器样式:TNC 连接器类型:插孔，母形插口 触头端接:焊接 保护端接:压接 阻抗:50 欧姆 安装类型:面板安装，隔墙式（前端螺母） 电缆组:RG-58， 58A， 58B， 58C， 141， 303， LMR-195， Belden B7806A， 9907 紧固类型:有螺纹 频率 - 最大值:11GHz 特性:热缩管 外壳颜色:银 侵入防护:IP67 - 防尘，防水 基体材料:黄铜 基体表面:镍 中心触头材料:磷青铜 中心触头镀层:金 介电材料:聚四氟乙烯（PTFE） 额定电压:500V 工作温度:-65°C ~ 165°C 标准包装:100
12-2160-1R 制造商:GC Electronics 功能描述:
1-221607-5 功能描述:RF 连接器 MALE CONTACT RoHS:否 制造商:Bomar Interconnect 产品:Connectors 射频系列:BNC 型式:Jack (Female) 极性: 触点电镀:Gold 阻抗: 端接类型:Solder 主体类型:Straight Bulkhead 电缆类型:
1-221607-6 功能描述:RF 连接器 MALE CONTACT AU RoHS:否 制造商:Bomar Interconnect 产品:Connectors 射频系列:BNC 型式:Jack (Female) 极性: 触点电镀:Gold 阻抗: 端接类型:Solder 主体类型:Straight Bulkhead 电缆类型: