[sdiy] Dual 914 diode in a SOT-23 package?

[Justin Owen]

Hi Neil,

>> The diodes will be used as per this schematic:
http://www.sdiy.org/juz/euro_input_detail_02.pdf

>I don't remember seeing that particular combination.  Anyway, I would  
remove D10 and D11

Why is that? Op Amp Cook Fig. 3.13 shows it as Common-Mode Input Protection.

>and D8 and D9 must be low-leakage types,  
definitely not 1N914.  Otherwise you'll likely get horrible non- 
linear behaviour.  See section 3.2.1 of IC Op-Amp Cookbook for examples.

I'm looking at Fig. 3.12 and it definitely has 914s listed.

I am using a first edition of that book though....

Not disagreeing with you - just asking for clarification. The last time we had this thread it did kind of end up as a three way tie so I know there's some different opinions on this matter.

Cheers,

J