This block has three numbers of inverting amplifiers of
gain 10 implemented using TL084. The Feedback resistor is 10K and
the
Series resistor is 1K internally. At the input you can add more
resistance to reduce the gain, for example adding a 1K in series at the
input makes the gain 5. The TL084 does not have any offset correction
feature.
TL084 Datasheet (PDF)