[sdiy] Differential Pair

[Ian Fritz]

Laurie --

A couple of years ago we looked at other NPN converter pairs. The LM394 
works fine, but is a bit pricey.

I've been using the CA3083 array. I measured Rbe to be only 1.3 Ohms (vs. 
5.0 Ohms for the CA3046) , and beta's over 200 were common. Matching was 
typically to within 0.2 mV, the best I could measure.

See the VCO designs on my website!

   Ian

   http://home.earthlink.net/~ijfritz/index.htm





At 04:44 PM 4/28/2002, Laurie Biddulph wrote:
>My synth VCO used a temperature compensated differential pair in the form 
>of the uA726 which appears to have gone in to the archives alongside the 
>dinosaurs (extinct). The MAT02 seems to be the first replacement of choice 
>here but has anyone looked at the LM194/LM394 or are there any other 
>alternatives to consider as well as selecting two trannies from the drawer?
>
>Best Regards
>(Mr) Laurie Biddulph
><http://www.ozemail.com.au/~boobies>http://www.ozemail.com.au/~boobies
>
>Tel: +61 2 4340 1525
>Fax: +61 2 4340 0936