参数资料
型号: TSH310ILT
厂商: 意法半导体
英文描述: 400A High-Speed Operational Amplifier
中文描述: 四楼高速运算放大器
文件页数: 15/19页
文件大小: 449K
代理商: TSH310ILT
The Bias of an Inverting Amplifier
TSH310
15/19
7 The Bias of an Inverting Amplifier
A resistance is necessary to achieve a good input biasing, such as resistance R shown in
Figure 30
.
The magnitude of this resistance is calculated by assuming the negative and positive input bias current.
The aim is to compensate for the offset bias current, which could affect the input offset voltage and the
output DC component. Assuming Ib-, Ib+, R
in
, R
fb
and a zero volt output, the resistance R will be:
Figure 30: Compensation of the input bias current
R
R
R
in
R
+
fb
-----------------------
=
R
Load
Output
R
fb
R
in
Ib-
Ib+
Vcc+
Vcc-
+
_
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