Found in an Analog Devices documentation from the 90s, this circuit uses operational amplifiers from the time. The power supply must be symmetrical.
This counterphase circuit is from a 1973 publication, and can work with mains voltages or 12 V....
This circuit can be used to directly control direct current loads or higher alternating current loads...
The acquisition of data, from a transducer, so that these data can be converted to digital form...