Instead it forms a pair of sample-and-hold amplifiers, alternately trimming its own offset as a differential amplifier and then trimming the offset of the other op-amp which does the amplification.

PCB Spark gap for primary ESD protection It implements a classic instrumentation amplifier ... For probing differential signals, it is possible to use a pair of probes, one for each signal ...

Here comes a new compact power amplifier that isn’t made in China: Pro-Ject Audio Systems’ Amp Box RS2 is made in Europe; it ...