[sdiy] protecting line level inputs

[Gergo.Palatinszky at nokia.com]

Hi,

 Depends the opamp type and supply voltage... can be different in the + and - range...

 Generaly we can say supply voltage (+-15V) +-1,5 volt (15-1,5 and -15+1,5) is fit most of the opamp spec. (check data-sheets)

 near to the supply voltage the distorsion is higher (sometimes it's a good thing :O)) over the supply voltage range probably our ICs going to be damaged ...

 You can use two zeners to limit ... might it's add a little? noise to that arround the zeners' brake-down voltage...

br,

Pala

-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of ext
modraj at msoe.edu
Sent: Wednesday, October 20, 2004 3:33 PM
To: synthdiy at sdiy.org
Subject: [sdiy] protecting line level inputs


SynthDIY:
I have determined through experiment that my mixer does not like +/- 15
volt spikes (because now it's broken).
What's the best way to send signals from prototype circuits (like a random
spike generator) to a line level input (zener diodes, pre-amplifier)? What
is the maximum +/- voltage that these can handle?
- Justin