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

The fuse or circuit breaker amp rating dictates the size of the wire and capacity limitations for the circuit. If you need more amps, you need bigger wire.

Looking at the circuit diagram it follows the classic op-amp with a long-tailed pair of NPN transistors driving a PNP gain stage and finally a complimentary emitter follower as an output buffer.

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.

Various techniques can reduce these errors, including inverted operating mode, dc biasing, small ac signal swing, proper selection of the op amp, and input impedance compensation.1 Matching the ...

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.