Re: Analog switch click... Will a low pass filter smooth it out?
- From: miso@xxxxxxxxx
- Date: 13 Dec 2006 18:00:16 -0800
PPP wrote:
Howdy!
I asked a question earlier regarding analog switches. I decided to
capture the output waveform from the oscilloscope using the analog
switch logic channel as my trigger point. Here is what I have:
http://tinypic.com/view/?pic=40pbxiv
I replaced the inverter in my original circuit (see here:
http://tinypic.com/view/?pic=2u6jvp3 ) with an attenuator. I guess it
makes since that the amplitude of the output waveform drops when it
switches.
For those with audio experience, does this discontinuity in the
waveform really cause a clicking sound? I figured that if I
instantaneously increase and decrease the amplitude of a sound source,
then I would only hear an annoying amplitude variation and not a click.
Also, if I add a low pass filter at the output of the switch and
configure it to have a 3dB frequency of 20KHz, then will this smooth
out the discontinuity?
Thank you!
P.
What is this the intent of the system, not just the switching circuit?
It looks like you are inserting a phase reversal in the path. How could
such a circuit NOT cause a click unless the switch was done at a zero
crossing?
.
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