An operational amplifier (op-amp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and a single-ended output. An op-amp produces an output voltage that is typically hundreds of thousands of times larger than the voltage difference between its input terminals.

Gideon Analytical Labs received two failed RV4141AM ground fault interrupter controllers. The devices had far different impedance values than a new one did on several of the input pins. The RV4141A is a low power controller for AC outlet appliance leakage circuit interrupters. These devices detect hazardous current paths to ground such as an appliance falling into the water. The interrupter then opens the circuit line before a harmful or lethal shock occurs.

Gideon Analytical Laboratories received two semi-operational LM386 operational amplifiers for failure analysis. An operational amplifier (op-amp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. Op-amps are linear devices that have all the properties required for DC amplification and are used in signal conditioning, filtering, or to perform a variety of mathematical operations. The op-amps received were reported to have quiescent current 2 to 3 times the normal value.

Gideon Analytical Labs received four Maxim 4252EUA dual op-amps for failure analysis. Operational Amplifiers or Op-amps are one of the basic building blocks of analog electronic circuits. Operational amplifiers are linear devices that have all the properties required for nearly ideal DC amplification and are therefore used extensively in signal conditioning, filtering or to perform mathematical operations such as add, subtract, integration and differentiation. It was reported the fails indicated no output.