An op amp is designed to amplify the differential signal applied across its input pins while rejecting any common-mode signal present. Put simply, a differential signal is created when a voltage ...

Learn how to measure current and voltage and the advantages of parallel circuits.

This circuit is often implemented using dual current feedback op amps (such as the OPA2677) but can give lower output noise using a decompensated dual voltage feedback op amp (for example, the OPA2614 ...

Author Mazi Hosseini describes a simple, low-cost, voltage-controlled current source using two op amps that provides a good range of current and maximum load.

Measuring a voltage is pretty easy: just place your multimeter’s probes across the relevant pins and read the value. Probing currents is a bit trickier, since you need to open up the circuit … ...

Current In a closed circuit that includes a source of potential difference (voltage) there will be a current flowing around the circuit.