Download Design Note 502 (PDF) Introduction Some ideal op amp configurations assume that the feedback resistors exhibit perfect matching. In practice, ...

The RA /RB voltage divider adds considerable resistance in series with the op amp's positive input terminal, equal to the parallel combination of the two resistors.

If you’ve ever wondered why an op amp has the little plus and minus symbols on it, its because at the heart of it, the device is a differential amplifier. The problem is that — ideally,… ...

How do you get the input of an op-amp to work below the negative-most supply rail?, I asked. Now I know – thanks to the patience of ADI field application engineer Andreas Koch. It was not just any ...

There were real-world curveballs, of course, not least of which was running out of the 10k resistors used for input averaging.

1. The JFETs in this voltage-controller amplifier act as linear resistors because the op amp constrains their drain-to-source voltages to a few tenths of a volt.

1. The traditional inverting op-amp summer configuration exploits the low-impedance node (virtual ground) at the inverting input. The circuit is easy and straightforward to analyze and design with ...