参数资料
型号: AG920-07
厂商: NVE Corp/Sensor Products
文件页数: 101/145页
文件大小: 0K
描述: KIT EVALUATION GT SENSOR
标准包装: 1
传感器类型: 磁性 GMR(大型磁阻传感)
接口: 模拟
嵌入式:
已供物品: 9 个板,CD,磁体,样品,焊膏
已用 IC / 零件: ABL 和 AKL 系列 GT 传感器
相关产品: 391-1058-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP
391-1057-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP
391-1056-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP
391-1055-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP
391-1036-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP
391-1035-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP
391-1034-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP
391-1033-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP
其它名称: 391-1022
Application Notes
Two Op Amp Bridge Amplifier
The two op amp circuit shown below reduces the loading of the preamplifier on the NVE bridge
outputs but still has a CMRR that is dependent on the ratio of resistor matching. The AC CMRR is also
poor in that any delay of the common mode signal through op amp U2 provides a mismatch in the
signals being delivered to op amp U3 for cancellation. Its advantages are simplicity and low cost.
+5V
C1 0.1uF
+5V
C3 0.1uF
3 +
7 V+
8 Vin+
5 Vout+
+5V
C2 0.1uF
2 -
U3
LMC7101A/NS
4 V-
6
Vout
1 Vout-
3 +
7 V+
4 Vin-
2 -
U2
LMC7101A/NS
4 V-
6
R1
R2
Vref
R4
R3
? ? R 2 ? ? 2R 2 ? ? ? R 2 ? ? R 4 ?
? R 3 ?
? R 1 ?
? R G ? ?
? R 1 ?
Vout = V ref + V IN ? 1 + ? ? + ? ? ? for ? ? = ? ? and V IN = (V out+ ) - (V out- )
RG
T WO O P A MP P REAMPLIFIER C IRCUIT
The equation for DC gain of the two op amp circuit (assuming infinite input impedance of the op
amps) is:
?
- 101 -
www.nve.com phone: 952-829-9217 fax: 952-829-9189
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