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Файл:Метрология / Lektsia_11
.ppt
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П - преобразователь
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Inverting amplifier
In an inverting amplifier, the output voltage changes in an opposite direction to the input voltage.
As with the non-inverting amplifier, we start with the gain equation of the op-amp:
This time, |
– is a function of both |
and |
due to the voltage divider formed by |
and |
. Again, the op-amp input does not apply an appreciable load, so: |
Substituting this into the gain equation and solving for 
:
If |
is very large, this simplifies to: |
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