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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By continuing to use this site, you are consenting to our use of cookies. 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. Neil Groves New Member Nov 7, 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.

Jameco has the LM’s: For one thing, the input bias would be different. Media New media New comments Search media. Neil Groves New Member Nov 8, From the LM data sheet it looks like the three amps with two caps each are just bandpass filters.

LM3900 substitute?

One of the cool things about the LM is that the input voltage can exceed the darasheet rails without a lot of fancy stuff. Replacement Transformer Started by ncag 38 minutes ago Replies: Hi, The LM was a very different kind of op amp.


I probably have few AD’s around, but i dont think i have any LM’s around anymore. This may not be the ideal setup, but it might still work. 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: Back in the 80’s i did.

It would be possible however to change the design a little to use a more typical op amp. You must log in or register to reply here. Forums New posts Search forums. 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. datzsheet

That’s what a specific timer of mine does. Click here to register now. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at To participate you need to register.

Datasheets, Manuals or Parts. Is an LM a good replacement for an LM?

Potentiometer Questions Started by norbss Yesterday at Hi again, Yeah i remember these from back in the ‘s. We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3. It operates on the difference in input current rather than the difference in input voltages.

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Welcome to our site! From what i read, the NTE is a replacement. Thread starter Neil Groves Start date Nov 7, It’s very different than the LM 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 dagasheet circuit. The feedback resistor R3 is then: Thus you could look for the presence of line to speaker levels very easily and even filter the hiss.


Roff Well-Known Member Nov 8, For a better experience, please dtaasheet JavaScript in your browser before proceeding. The LM is not a normal OP amp.

Hi, Lm39000 be careful about using an AD for a replacement. I am surprised to see them in circuits today.

Redesigning them for other op amps probably wouldnt be much of a problem really. Electro Tech is an online community with overmembers who enjoy talking about and building ddatasheet circuits, projects and gadgets.

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

The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground. The LM is a high speed version. Articles Top Articles Eatasheet resources. Maybe this was a very old design.