LM310/LM110 - need a replacement

If I think of, I'll bring a couple home monday. I'm sure we have spares since we have boards that use them.

It looks like (you better check if you use this idea) that an TL071 (jfet inputs) would slot in very well if you can live with the reduced bandwidth (3MHz vs 20MHz) and slew rate (13V/uS vs 40V/us)

Unicorn Electronics has the LM310N in stock at

"Jim Flanagan"

The LM310 is not jfet.

..... Phil

Nice to know about that site, I noticed they're not cheap!

I also noticed they have some LM377N which I have a crap load of from years ago :) I used them not for audio but for small servo to run little DC motors in a bridge mode. Maybe I can offer to sell them! :)

Yes... you are quite right. Not sure where I got 'JFET' input from? Thanks

Seems to be using the same "super gain" NPN transistors for the inputs as the LM308 does.

Amazing stuff for ICs released in the late 1960s.

..... Phil

m?

uts as

Bob Widlar was amazing.

-- Bill Sloman, Nijmegen

NTE crossrefs to a NTE924

$15 at Mouser (ouch)

The LM110/310 is a follower - i.e., unity gain, so if you used an opamp, you'd have to add a clooge to strap it down to unity gain.

Doesn't have to be a _big_ clooge, if it's a one-off; just lash up a feedback resistor somewhere near the chip, or maybe even just short the output to the "-" input.

One time, my engineer and I were musing about a circuit - he said, "A zero gain inverter? What would you use a zero gain inverter for?" I said, "virtual ground." He went, "Ah." and went away happy. :-)

Hope This Helps! Rich

Hi Rich.. Thanks, yes doing what you mentioned is certainly an easy option. I may end up doing that in the end. Jim