[sdiy] 40106 astable multivibrator - origins

[David Manley]

On 11/15/17 12:17 PM, Donald Tillman wrote:
>
>> On Nov 15, 2017, at 11:49 AM, bbob <fluxmonk at gmail.com 
>> <mailto:fluxmonk at gmail.com>> wrote:
>>
>> anybody know the origins or first publication of the 40106 astable 
>> multivibrator circuit? i've found it in a 1992 intersil data sheet, 
>> but i think it's been around longer than that....
>
> Oh good grief, that's old as the hills.  :-)
>
> It was probably in the data sheet for the original 40106.
>
> But before that, it was probably in the data sheet for the first CMOS 
> Schmitt Trigger.
>
> And before that, astable multivibrators were featured in the very 
> first CMOS application notes.
>
> Check out the 1979 RCA COS/MOS manual; it has a whole chapter on 
> multivibrators.
>
> https://archive.org/details/RcaCosmosIntegratedCircuitsManual
>
>   -- Don
> --
> Donald Tillman, Palo Alto, California
> http://www.till.com
>
Gotta love those old manuals and what was in them.

Also go look in any of the old combo organs - they're packed full of 
*transistor* based astable multivibrators.

-Dave
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