Osc reset time

[Paul Perry]

At 05:18 PM 17/12/98 -0000, Fraser, Colin J wrote:

>The glitches that are present must only last as long as the switch over time
>(300ns) - I would expect these to be well above audio range, so they could
>disappear with a bit of high frequency roll-off in the buffer amp.
>
I think the 'audibility' of a glitch depends on its frequency, more than its
width.
I had a half wave diode based power supply, in which the diodes generated an 
astonishingly narrow (and high!) spike as they switched off every cycle.
I couldn't resolve the spike on my 35MHz cro, but guess it was ringing on the 
AC low voltage psu supply lead. This coupled into everything!
Yes, it has harmonics up to god knows where, but it sounded like psu hum.

If a spike is on an oscillator's waveform, I doubt you could hear it.

paul perry melbourne australia