AW: analog switches and thd

Haible Juergen Juergen.Haible at nbgm.siemens.de
Wed Jun 25 14:34:34 CEST 1997



	>Does anybody know, how much distortion (thd) is introduced
	>by using a cheap CD4066 CMOS-Switch instead of an expensive
relay
	>@ Vdd=7.5V, Vss=-7.5V, Vsignal 1Vpp, signal current 100uA ?
	>
	>And what about noise ?

Noise and distortion should be no problem with a 4066. On-resistance
is a little bit voltage dependend, which *could* produce distortion -
but
it won't, if you load the switched signals with a high impedance (100k).

If you have several signals to choose from, only one (stereo pair) at a
time,
I'd rather use something like the CD4051. Same Technology, only that
switches are organized as 1p8t already. Also very cheap.

JH.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/ms-tnef
Size: 1712 bytes
Desc: not available
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/19970625/cd55c4ae/attachment.bin>


More information about the Synth-diy mailing list