RHF310K-01V View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'RHF310K-01V' PDF : 22 Pages View PDF
RHF310
6
Bias of an inverting amplifier
Bias of an inverting amplifier
A resistance is necessary to achieve good input biasing, such as resistance R shown in
Figure 26.
The value of this resistance is calculated from the negative and positive input bias current.
The aim is to compensate for the offset bias current, which can affect the input offset voltage
and the output DC component. Assuming Iib-, Iib+, Rin, Rfb and a 0 V output, the resistance
R is:
R = -R----i-n-----×----R-----f--b-
Rin + Rfb
Figure 26. Compensation of the input bias current
R
fb
Iib -
Rin
_
VCC+
+
Iib +
R
VCC -
Output
Load
AM00839
Doc ID 15577 Rev 3
17/22
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