The operational amplifier (op-amp) is a high performance gain device with essentially linear qualities.

The circuit shown in Figure 5 is quite versatile. Removing the capacitors causes the circuit to degenerate to the inverting amplifier configuration (see Common op-amp circuits). Leaving the feedback ...

In previous articles—Common op-amp circuits, Op amps do integration, and The practical op-amp differentiator is quite versatile—we looked at some classic op amp circuits. These circuits used negative ...

For continuous-duty, high-amperage circuits Hamilton prefers to use ring terminals rather than spade connectors, since they offer a superior connection with less chance of failure.

The op-amp circuit in question. He starts with the current source, a simple circuit of two diodes, a resistor, and a transistor that sets the bias for the two-transistor differential amplifier.