Today, three test-circuit topologies are commonly used for bench and production testing of DC parameters in operational amplifiers. These three topologies are 1) the two-operational-amplifier test ...

In part 1 of this series, we introduced you to three op-amp test circuits: A self-test circuit, a two-op-amp loop, and a three-op-amp loop. The circuits let you test V OS (offset voltage), CMRR ...

Maybe you are familiar with the op-amp as an extremely versatile component, and you know how to quickly construct a huge variety of circuits with one. Maybe you even have a favorite op-amp or two f… ...

Op amps are the basic building blocks for much of linear circuit design. You probably learned about them in college and even designed some products containing an op amp.

Yet there are some types of circuits where inherent but small op-amp error sources can’t be tolerated. As a result, precision IC op amps have been created to address these needs.

The circuit is based on a single AD8534 quad op amp chip. The first stage measures the voltage across the circuit under test in response to small current and amplifies it.