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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Jameco has the LM’s: Hi, I’d be careful about using an AD for a replacement. Neil Groves New Member Nov 8, The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground.

LM Datasheet(PDF) – Motorola, Inc

Hi again, Yeah i remember these from back in the ‘s. 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. That’s what a specific timer of mine does.

The feedback resistor R3 is then: Forums New posts Search forums. Replacement Transformer Started by ncag 38 minutes ago Replies: Articles Top Articles Search resources. For a better experience, please enable JavaScript in your browser before proceeding.


Potentiometer Questions Started by norbss Yesterday at Is an LM a good replacement for an LM? Welcome to our site! It operates on the difference in input current rather than the difference in input voltages. To participate you need to register. This may not be the ideal setup, but it might still work.

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. Electro Tech datsheet an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

The LM is a high speed version. Thread starter Neil Groves Start date Nov 7, One of the cool things lm33900 the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff.

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Thus you could look for the presence of line to datashfet levels very easily and even filter the hiss. You must log in or register to reply here.


Back in the 80’s i did. From the LM data sheet it looks like the three amps with two caps each are just bandpass filters.

National Semiconductor

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. 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: From what i read, the NTE is a replacement.

Redesigning them for other op amps probably wouldnt be much of a problem really. It’s very different than the LM This site uses cookies to lm3090 personalise content, tailor your experience and to keep you logged in if you register.