
4 Measurements (audio and video)
Ingenious video op-amp
In an instrumentation amplifier, both inputs are high impedance and
floating with respect to ground, but performance is limited to the sub-rf
range. The op-amp described here avoids that limitation, operating up
to many tens of MHz.
Four
op-amp
inputs
are
better
than
two
The INGENIous enginEER (in continental Europe the word for engineer
is ingenieur) is always looking for elegant and economical solutions to
design problems. Back in the 1970s when the RCA CA3130 BiMOS op-
amp became available, it was clearly the answer to many an engineer's
prayer, with its very high input impedance compare ...