• Please review our updated Terms and Rules here

Enough power to decode PCM?

Flowing current can make noise all by itself. It's the same principle which makes an AC transformer hum and the flyback transformer in a TV set squeal. I have a Sony Walkman which has no built-in speaker, but if you unplug the headphones and turn the volume all the way up, you can hear a faint, tinny rendition of the audio -- the circuitry inside the Walkman itself is making the noise!

Remember the first electronics project you (ie, almost all of us) ever built...that crystal radio...?

--T
 
Back
Top