In this case, it’s another, even simpler audio oscillator, this time with just a loudspeaker and a battery. Attentive readers will recall the previous title holder was indeed pretty simple ...

But the design goals are pretty clear: build an oscillator with as little distortion as possible across the audio frequency range. The basic circuit is the well-known Wien bridge oscillator where ...

In this paper, we present a flexible ring oscillator IP designed for a 40nm CMOS technology, whose oscillation frequency can be chosen from 200kHz to 20MHz. It was developed using a new design ...