Offset data conditioning card: The function of offset data
conditioning card is to clamp the given AC signal with respect
to a reference DC voltage. The reference DC voltage is preset
according to the components used in the circuit which intern
depends on the maximum load rating. The circuit diagram of the
offset data conditioning card is as shown. It consists of two opamps, UA714CN which are operated in inverting mode. The
first op-amp is used as a summing amplifier. It adds up the input
signal with the DC reference voltage