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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Neil Groves New Member Nov 7, It would be possible however to change the design a little to use a more typical op amp. Neil Groves New Member Nov 8, This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Hi, I’d be careful about using an AD for a replacement.

From what i read, the NTE is a replacement. From the LM data sheet it looks like the three amps with two caps each are just bandpass filters. 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.

Maybe this was a very old design.

To participate you need to register. Forums New posts Search forums. The LM is a high speed version. I probably have few AD’s around, but i dont think i have any LM’s around anymore. Replacement Transformer Started by ncag 38 minutes ago Replies: Datasheer of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff. That’s what a specific timer of mine does. The LM is not a normal OP amp.


LM3900 substitute?

The feedback resistor R3 is then: For one thing, the input bias would be different. By continuing to use this site, you are consenting to our use of cookies. You must log in or register to reply here. Roff Well-Known Member Nov 8, Potentiometer Questions Started by norbss Yesterday at Is an LM a good replacement for an LM? Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

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

It operates on the difference in input current rather than the difference in input voltages. Datasheeh them for other op amps probably wouldnt be much of a problem really. 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.

This may not be the ideal setup, but it might still work. It’s very different than the LM Welcome to our site! I couldn’t locate one of the latter so relayed my circuit to use an LM instead, well it om3900 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: For a better experience, please enable JavaScript in your browser before proceeding.


Hi, The LM was a very different kind of op amp. Thus you could look for the presence of line to speaker levels very easily and even filter the hiss. We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3. Jameco has the LM’s: Click here to register now. I am surprised to see them in circuits today. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Thread starter Neil Groves Start date Nov 7, Back in the 80’s i did.

It can datasheet be replaced with a LM op amp.

Hi again, Yeah i remember these from back in the ‘s. Media New media New comments Search media. Datasheets, Manuals or Parts. The circuit uses a single polarity supply so grounding the non-inverting input of dafasheet opamps would cause their outputs to be grounded and they would work like rectifiers.

Articles Top Articles Search resources. The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground.