More on Crosspoints.

[Curtin, Steven D (Steven)]

Hi Paul,

Another part is the MT8808 from Mitel, which is an 8x8 analog switch.  I got
samples years ago and keep meaning to hook them up.  Check out www.mitel.com
for details.  Setting the bits in the chip is a pain unless you have it
hooked up to a micro.

If you put the matrix in the middle of a circuit with the outputs going to
summing opamps, and the inputs going through 10k or so resistors, would this
not give you a logic-controlled switching mixer?  Or am I missing something?
For audio you could also put in DC offset blocking bypass caps.

Steve C

> ----------
> From: 	Paul Maddox[SMTP:paul.maddox at ndirect.co.uk]
> Sent: 	Thursday, June 15, 2000 6:56 AM
> To: 	synth-diy
> Subject: 	More on Crosspoints.
> 
> Dear all,
> 
> 
>   One of the problems I am facing is the fact that the cross point switch
> needs a high'ish on
> resistance. I shall try and explain.
> 
> If the switchs had no on resistance then the last point on CV3 would be
> affected by all the
> other CVs as at one point they are connected to each other. The other
> problem would be that the CVs comming into the matrix would be fighting
> each
> other and that if one input was at say 5v and the other at -5v then you
> would be shorting stuff out.
> 
>