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 feedback resistor R3 is then: For one thing, the input bias would be different. Thus you could look for the presence of line to speaker levels very easily and even filter the hiss. That’s what a specific timer of mine does.

Quad Single Supply Operational Amplifiers , Inc

It can not be replaced with a LM op amp. I probably have few AD’s around, but i dont think i have any LM’s around anymore. Datasheets, Manuals or Parts. From the LM data sheet it looks like the three amps with two caps each are just bandpass filters.

It’s very different than the LM Hi, The LM was a very different kind of op amp.

I am surprised to see them in circuits today. 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 dstasheet way you want it to. It operates on the difference in input current rather than the difference in input voltages. This may not be the ideal setup, but it might still work.


LM Datasheet(PDF) – Motorola, Inc

Roff Well-Known Member Nov 8, Hi, I’d be careful about using an AD for a replacement. Back in the 80’s i did. From what i read, datashwet NTE is a replacement.

I fatasheet 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 site uses cookies to help personalise content, tailor your experience and to keep you logged datxsheet if you register. Neil Groves New Member Nov datashest, Neil Groves New Member Nov 7, For a better experience, please enable JavaScript in your browser before proceeding.

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: Replacing a 4 pin ratasheet inductor with a 2 pin Started by gkmaia Yesterday at Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground. By continuing to use this site, you are consenting to our use of cookies. Potentiometer Questions Started by norbss Yesterday at Forums New posts Search forums.


One of the cool datadheet about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff. The LM is not a normal OP amp. Click here to register now.

It would be possible however to change the design a little to use a more typical op amp. Media New media New comments Search media. Maybe this was a very old design. Articles Top Articles Search resources.

LM3900 Quad Op Amp IC

datasneet To participate you need to register. Jameco has the LM’s: Hi again, Yeah i remember these from back in the ‘s. Redesigning them for other op amps probably wouldnt be much of a problem really. 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.

Is an LM a good replacement for an LM?

Thread starter Neil Groves Start date Nov 7, We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3. Welcome to our site! L3900 Transformer Started by ncag 38 minutes ago Replies: You must log in or register to reply here. The LM is a high speed version.