The Strange Case of the Large Offset

or, Treat Your Diodes Like Mushrooms

The use of back-to-back protective diodes, a time-worn, tried-and-true arrangement used to prevent damage to op-amp input stages, in a garden-variety application with a 741-type amplifier, led to the manifestation of an interesting phenomenon. If you have had similar symptoms, without being aware of the cause, the following words may be helpful. Read full article



Richard P. Johnson