Author Topic: which IC for audio switching  (Read 357 times)

0 Members and 1 Guest are viewing this topic.

Offline brownt

  • Regular Contributor
  • *
  • Posts: 89
  • Country: au
which IC for audio switching
« on: January 19, 2019, 02:58:40 am »
Hi,

I would like to make a guitar signal level, audio switching circuit. I was thinking a 4066 or 4053, but I don't know how these might degrade the signal. Are they ok, or are there some specifically designed ICs that are better. thanks
 

Offline xavier60

  • Super Contributor
  • ***
  • Posts: 1211
  • Country: au
Re: which IC for audio switching
« Reply #1 on: January 19, 2019, 03:34:07 am »
Wow, I have just told someone else the same thing.  :)
CMOS analog switches have non-linear resistance with signal swing. To minimize distortion, they have to be lightly loaded. Also keep the signal swing well within the bounds of the supply rail voltages.
This looks useful, http://www.geofex.com/Article_Folders/cd4053/cd4053.htm
« Last Edit: January 19, 2019, 03:36:27 am by xavier60 »
Hioki AS100D vom, HP 54645A dso, Fluke 87V dmm, AN8008 dmm, Agilent U8002A psu,  FY6600 function gen, New! Brymen BM857S-(With Battery)
 
The following users thanked this post: brownt

Offline Richard Crowley

  • Super Contributor
  • ***
  • Posts: 4310
  • Country: us
  • KE7GKP
Re: which IC for audio switching
« Reply #2 on: January 19, 2019, 03:37:48 am »
4066 has been seen in some rather high-end audio gear.
When applied properly (powering, biasing, loading, etc.)
I thought this was interesting:
http://www.thetonegod.com/tech/switches/switches.html
 
The following users thanked this post: brownt

Offline John B

  • Regular Contributor
  • *
  • Posts: 224
  • Country: au
Re: which IC for audio switching
« Reply #3 on: January 19, 2019, 03:39:21 am »
Is it a battery based application? A small signal mechanical relay may provide the most performance for an audio application. Ie, low resistance, no non-linearities, isolated signal and control circuits. In mains powered stuff it's the way to go.
 
The following users thanked this post: brownt


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf