[sdiy] Changing an LM13x00 with a LM13x00

[harrybissell]

uhhh no... Three...

Three answers...

OTA, Buffer, and 'who cares'

Among the many answers...

1) What Jim said

2) The 13600 has a connection between the Gm bias input and the buffer...
so it is variable bias.  Better for full range, but a fast moving control signal

might couple in through the buffer

3) The 13700  has a fixed bias... you cannot change it. Its good for most apps.

4)  TRY it.  In most cases they can be swapped with no noticible effect on
performance.

H^) harry    (among our many weapons are fear, surprise, torture, and an almost
fanatical devotion... :^)

James Patchell wrote:

> There are two answers....
>
>          Using only the OTA section....interchange to your hearts content...
>
>          Also using the BUFFER section....No, they are not 100%
> compatible.  The buffer sections are biased differently in the two chips,
> and some applications, this makes a big difference.
>
> At 02:53 PM 12/16/2005 +0000, tom.adam at telenet.be wrote:
> >Guys,
> >
> >I was wondering if it's possible to interchange a LM13700 & LM13600
> >without  other changes?
> >I noticed on the datasheet that the buffer input current is entirely
> >different so I guess I need to change some resistor values?
> >
> >Cheers,
> >Tom
>
>          -Jim
> ***************************************************************
> http://www.oldcrows.net/~patchell
>
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