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 not a normal OP amp.

Thus you could look for the presence of line to speaker levels very easily and even filter the hiss. Redesigning them for other op amps probably wouldnt be much of a problem really. The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground.

This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. It can not be replaced with a LM op amp. For a better experience, please enable JavaScript in your browser before proceeding. The LM is a high speed version. It would be possible however to change the design a little to use a more typical op amp. 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.

Thread starter Neil Groves Start date Nov 7, Media New media New comments Search media. I am ln3900 to see them in circuits today. The feedback resistor R3 is then: I probably have few AD’s around, but i dont think i have any LM’s around anymore.


We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3.

Quad Single Supply Operational Amplifiers , Inc

Hi, I’d be careful about using an AD for a replacement. Neil Groves New Member Nov 7, Jameco has the LM’s: Back in the 80’s i did. 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.

Maybe this was a very old design. Click here to register now. To participate you need to register.

(Datasheet) LM pdf – (LM / LM / LM) Quad Amplifiers (1-page)

This may not be the ideal setup, but it might still work. One of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff. From what i read, the NTE is a replacement.

Neil Groves New Member Nov 8, Hi, The LM was a very different kind of op amp. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Is an LM a good replacement for an LM? That’s what a specific timer of mine does. It operates on the difference in input current rather than the difference in input voltages.


By continuing to use this site, you are consenting to our use of cookies. Welcome to our site! Replacement Transformer Started by ncag 38 minutes ago Replies: Forums New posts Search forums. Roff Well-Known Member Nov 8, Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at 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.

Hi again, Yeah i remember these from back in the ‘s. Articles Top Articles Search resources. I couldn’t locate one of the latter so ddatasheet 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: Potentiometer Questions Started by norbss Yesterday at From the LM data sheet it looks like the three amps with two caps each are just bandpass filters.

You must log in or register to reply here. For one thing, the input bias would be different. Datasheets, Manuals or Parts. It’s very different than the LM