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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National Semiconductor – datasheet pdf

It would be possible however to change the design a little to use a more typical op amp. I probably have few AD’s around, but i dont think i have any LM’s around anymore. 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 the LM data sheet it looks like the three amps with two caps each are just bandpass filters.

Back in the 80’s i did. Hi, I’d be careful about using an AD for a replacement. Is an LM satasheet good replacement for an LM?


Replacement Transformer Started by ncag 59 minutes ago Replies: Thus you could look for the presence of line to speaker levels very easily and even filter the hiss. The LM is not a normal OP amp. That’s what a specific timer of mine does.

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 dxtasheet input is a 4V p-p sine wave from my generator, i am building the circuit here: Maybe this was a very old design. Click here to register now.

LM Datasheet(PDF) – Motorola, Inc

Redesigning them for other op amps probably wouldnt be much of a problem really. Neil Groves New Member Nov 8, Media New l3900 New comments Search media.

Hi, The LM was a very different kind of 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 dayasheet they would work like rectifiers. Hi again, Yeah i remember these from back in the ‘s.


LM3900 Quad Op Amp IC

The Datsheet is a high speed version. Datasheets, Manuals or Parts. For one thing, the input bias would be different. Thread starter Neil Groves Start date Nov 7, From what i read, the NTE is a replacement. Ln3900 of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff. Neil Groves New Member Nov 7, Potentiometer Questions Started by norbss Yesterday at You must log in or register to reply here.

LM3900 substitute?

We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3. Welcome to our site! The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground.

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It’s very different than the LM Forums New posts Search forums. The feedback resistor R3 is then: