Hi Roy,

On 16-Jan-04, Roy J. Tellason wrote to George White:

 RJT>> They were LM310.

 GW>> Right. Nationl Semiconductor chips, for which I happen to have a
 GW>> data book (useful this _real_ book library at times like this
 GW>> ).

 RJT> I've got one of those too,  that I bought at of all places Radio
 RJT> Shack!  There was a short time when they actually sold such
 RJT> things..

They are dead and gone over here :-(. They used to trade as Tandy in
the UK but sold the operation to (of all people) a company called
Carphone Wharehouse, who kept some of the company owned stores and
turned them into mobile 'phone shops, closed down the distribution
setup and the franchised outlets (which was most of them)...

 RJT> Other than that, my databook collection is pretty sporadic,  I
 RJT> got 'em when I could,  and there are a lot of gaps,  which is why
 RJT> I'm collecting datasheets in pdf format these days

 GW>> LM110/210/310 Voltage follower.

 RJT> 

 RJT> What I don't understand there is why I'd want to use one of those
 RJT> rather than just use an op amp connected in a unity-gain
 RJT> configuration..

 RJT> 

The reason was in the bit you snipped! :-(. They have better bandwidth
than the common Op-amps of the era (like the 741, which they predate),
and are compensated (unlike the 709) and so are easier to use.

George

--- Terminate 5.00/Pro