Once ubiquitous, the incandescent light bulb has become something of a lucerna non grata lately. Banned from home lighting, long gone from flashlights, and laughed out of existence by automotive ...

If we replace the potentiometer VR1 with an AC signal plus DC bias signal in any of the previous Figures 3 to 17, the voltage controlled attenuators can become an amplitude modulator circuit instead.

Back at the previous job, I supplied customers with literature, samples, and excellent applications help regarding the use of DCPs (digitally controlled potentiometers). I remembered a zany idea I'd ...