Here is a closer look at why old transistors and op-amps are still up and running after decades of their launch.

A friend recently sent me an email noting that the classic 2N3904 bipolar transistor was now 60 years old. Since its “birth” ...

Making a precision programmable current sink by floating the long-forgotten anode pin of the TL431 voltage regulator.

The acoustic principles of normal and artificial speech production that were followed in arriving at the new design are presented, along with descriptions of the transistor circuit and its operating ...