{"id":168,"date":"2023-03-20T14:36:09","date_gmt":"2023-03-20T05:36:09","guid":{"rendered":"https:\/\/hkd.co.jp\/wordpress\/?post_type=amr&p=168"},"modified":"2023-10-04T11:00:13","modified_gmt":"2023-10-04T02:00:13","slug":"amr_term","status":"publish","type":"amr","link":"https:\/\/hkd.co.jp\/english\/amr\/amr_term\/","title":{"rendered":"Glossary"},"content":{"rendered":"\n


Glossary<\/strong><\/h1>\n\n\n\n
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1. Parallel sensingline type \/vertical type AMR sensor<\/strong><\/h2>\n\n\n\n
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Technical document: The principle of operation of the AMR sensor is explained.<\/p>\n\n\n\n

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Go to details<\/a><\/p>\n\n\n\n

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2. Equivalent circuit<\/strong><\/strong><\/h2>\n\n\n\n
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Represents the equivalent circuit of an AMR sensor. The resistor pattern indicates the direction of extension of the element on the magnetic sensing surface.<\/p>\n\n\n\n

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3. Input resistance<\/strong><\/h2>\n\n\n\n
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It represents the resistance value per bridge (between Vcc and GND: in the case of a 2-phase bridge, when both ends are connected in parallel) or per element in no magnetic field.<\/p>\n\n\n\n

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4. Midpoint potential<\/strong><\/strong><\/h2>\n\n\n\n
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It represents the voltage output from Vout (Vout+, Vout-) when 5V is applied between Vcc-GND in no magnetic field.<\/p>\n\n\n\n

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5. Midpoint potential difference<\/strong><\/strong><\/h2>\n\n\n\n
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It represents the difference between the midpoint potential of Vout+ and Vout\u2212 when 5V is applied between Vcc-GND in no magnetic field.<\/p>\n\n\n\n

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6. Output voltage<\/strong><\/strong><\/h2>\n\n\n\n
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It represents the amount of change in midpoint potential in a magnetic field under certain conditions.
At our company, the applied voltage is based on 5V. The output voltage is proportional to the applied voltage.<\/p>\n\n\n\n

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7. Peak-to-peak voltage (mV)<\/strong><\/strong><\/h2>\n\n\n\n
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Represents the width of the amplitude of the output voltage. When a rotating magnetic field is applied to an AMR sensor for position detection\/rotation detection, it will be twice the output voltage in the case of a half-bridge, and four times the output voltage in the case of a full-bridge.<\/p>\n<\/div>\n\n\n\n

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8. Resistance temperature characteristics<\/strong><\/strong><\/h2>\n\n\n\n
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(RT2 – RT1) \u2215 {RT1 (T2 – T1)} x 100 (%\/\u00b0C)<\/p>\n\n\n\n

RT1: Resistance value (\u03a9) at T1 (\u00b0C)<\/p>\n\n\n\n

RT2: Resistance value (\u03a9) at T2 (\u00b0C)<\/p>\n<\/div>\n\n\n\n

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9. Midpoint potential temperature drift<\/strong><\/strong><\/h2>\n\n\n\n
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We use the following two types of notation depending on the difference in notation method.<\/p>\n\n\n\n

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9-1\uff0e<\/p>\n\n\n\n

Midpoint potential temperature drift<\/p>\n<\/div>\n\n\n\n

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Vd\uff1aDrift amount\uff08\u03bcV\uff09 at Vcc\uff08V\uff09<\/p>\n\n\n\n

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9-2\uff0e<\/p>\n\n\n\n

Midpoint potential temperature drift<\/p>\n<\/div>\n\n\n\n

Drift amount when Vcc = 5V and the operating ambient temperature of each product is substituted for T1 and T2 in formula (A)<\/p>\n<\/div>\n\n\n\n

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10. Output voltage temperature characteristics<\/strong><\/strong><\/h2>\n\n\n\n
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(V T2 – V T1) \/ {V T1 (T2 – T1)} x 100 (%\/\u00b0C)<\/p>\n\n\n\n

V T1: Output voltage (V) at T1 (\u00b0C)<\/p>\n\n\n\n

V T2: Output voltage (V) at T2 (\u00b0C)<\/p>\n<\/div>\n\n\n\n

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11. Magnetic Field Unit<\/strong><\/strong><\/h2>\n\n\n\n
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Magnetic field (H) 1kA\/m = 12.5 Oe<\/p>\n\n\n\n

Since the magnetic permeability (\u03bc) is about 1 in the atmosphere,<\/p>\n\n\n\n

From B = \u03bcH, the relationship with the magnetic flux density (B) is 1 Oe \u2252 0.1mT.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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12. Magnetization pitch (\u03bb)<\/strong><\/strong><\/h2>\n\n\n\n
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It represents the distance from the center of the N pole to the center of the S pole in a magnet magnetized with multiple poles.<\/p>\n\n\n\n

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