National Semiconductor LM and. LM, Respectively description. These devices consist of four independent, high- gain frequency-compensated Norton. LM description These devices consist of four independent, high gain frequency-compensated Norton operational amplifiers that were designed. LM MC Unit. Supply Voltage. VCC. + + V. Input Current. Iin. mA on the individual data sheets and the Selector Guide. All of the.

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The LM is a high speed version.

We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3. That’s what a specific l3m900 of mine does. To participate you need to register. Neil Groves New Member Nov 8, Maybe this was a very old design. Thread starter Neil Groves Start date Nov 7, Media New media New comments Search media.

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Hi again, Yeah i remember these from back in the ‘s. One of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff. Roff Well-Known Member Nov 8, I couldn’t locate one of the latter so relayed my circuit to use an LM instead, well it doesn’t work, i checked my output from the first stage and it sits at 10V although the input is a 4V p-p sine wave from my generator, i am building the circuit here: Forums New posts Search forums.


Replacement Transformer Started by ncag 59 minutes ago Replies: Hi, I’d be careful about using an AD for a replacement.

Back in the 80’s i did. Welcome to our site! Is an LM a good replacement for an LM?

LM Datasheet(PDF) – Motorola, Inc

I seem to have blown out on at least two things here, i’m gonna scrap that project, build something else i need then come back to it using a different circuit. By continuing to use this site, you are consenting datahseet our use of cookies.

The non-inverting inputs should connect to half datashet supply voltage filtered with a capacitor to ground. It would be possible however to change the design a little to use a more typical op amp. Thus you could look for the presence of line to speaker levels very easily darasheet even filter the hiss. The circuit uses a single polarity supply so grounding the non-inverting input of the opamps would cause their outputs to be grounded and they would work like rectifiers.

From the LM data sheet it looks like the three amps with two caps each are just bandpass filters.

Click here to register now. I am surprised to see them in circuits today. Redesigning them for other op amps probably wouldnt be much of a problem really. You must log in or register to reply here. Datasheets, Manuals or Parts. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at It’s very different than the LM Electro Tech is an online community with overmembers who enjoy ln3900 about and building electronic circuits, projects and gadgets.


This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. The Q of each bandpass would be a little higher though so you’d have to try it and modify the values slightly if it doesnt seem to work the way you want it to. Jameco has the LM’s: From datwsheet i read, the NTE is a replacement. For one thing, the input bias would be daatasheet.

LM3900 Datasheet PDF

Potentiometer Questions Started by norbss Yesterday at The LM is not a normal OP amp. It operates on the difference in input current rather than the difference in input voltages. Hi, The LM was a very different kind of op amp.

I datasjeet have few AD’s around, but i dont think i have any LM’s around anymore.

LM3900 substitute?

It can not be replaced with a LM op amp. This may not be the ideal setup, but it might still work.

Neil Groves New Member Nov 7, The feedback resistor R3 is then:

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