[sdiy] (OT) Doepfer MIDI-CV oddity

[Jerry Gray-Eskue]

Don't forget that you will get variations in devices even from the same 
manufacturer, and same batch.
Consider for a moment grading out transistors to get a "matched pair".
Ideally a design will run the parts somwhere in the middle of the device 
characteristics while allowing the variations to still be inside acceptable 
limits.

----- Original Message ----- 
From: "Neil Johnson" <neil.johnson97 at ntlworld.com>
To: "Tom Wiltshire" <tom at electricdruid.net>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, January 19, 2011 7:34 AM
Subject: Re: [sdiy] (OT) Doepfer MIDI-CV oddity


> Hi Tom,
>
>> I made the (not unreasonable, I don't think) assumption that parts with 
>> the same part number are functionally identical.
>
> A _VERY_ dangerous assumption.  As an example, go and compare the
> datasheets of the various different manufacturers of the seemingly
> innocuous 4046.
>
> Neil
> -- 
> http://www.njohnson.co.uk
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