Classic LM741 OpAmp Simulation in MicroCap Tutorial

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n this video 'How an OpAmp works - OpAmp Introduction' I'll introduce the beginning of a series for the OpAmp. In this video I'll show the Inverting OpAmp and how it works. #LM741 #OPAMPschematic #MicroCap #ClassicOpAmp
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26 июл 2024

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Комментарии : 43

@rednerdnecktech2474 2 года назад

The 741 is one of my favorite op amps for audio preamps because of it's high input impedance and it's very cheap.

@KissAnalog 2 года назад

Thanks for your feedback! It is a great low cost OpAmp;)

@jstro-hobbytech 2 года назад

I think it's a very cool tutorial Eddie. I think you should break it down into a series and breadboard each section of the internals and explain each. Imsai guy did it too but the 741 is much more complex. I did love the overlay. I understand opamps somewhat but I've never seen anyone say hey "we're going to build a simple audio amplifier based on opamps ands gain stages where we start with a cheap little condenser mic or headphone input jack and go right through to where we hear something in mono out to a 5 watt speaker on the other end". Everyone gets on the same page like this with the gain, delta v, dc blocking bypass caps, emitter collector and follower for maintaining the signal integrity. Do one section of which ever circuit chosen once a week or something. Like a 15 minute video once a week on a bread board where it might take 3 months to complete including troubleshooting after we're finished to clean up the signal. I've prayed for a video like that for ages and paid (wink wink) not you Eddie, he will get the joke when he reads this lol. I digress. Great video Eddie, original take on the subject.

@KissAnalog 2 года назад

Thanks Joey for the great feedback! I'll make a playlist for OpAmps and build to it;)

@jstro-hobbytech 2 года назад

@@KissAnalog that's awesome. I drew a schematic for a proper op amp circuit psu. I'm going to test it this week sometime.

@sunuk1915 2 года назад

Microcap is cool simulation 👌 most useful 741 stuff It's very common high gain opamp which found maximum measurement instruments and industrial applications Thank you very much 💞

@KissAnalog 2 года назад

Thanks so much! Always great to hear from you!

@sunuk1915 2 года назад

@@KissAnalog welcome dear brother 🙏

@MarcelHuguenin 2 года назад

Haha, cool video Eddie. Loved the way you overlayed the logic symbol over the schematic diagram and even connect them to demo :) Could you do a video on designing a circuit and find the required characteristic by using Microcap's analysis ? Just some simple circuit. Maybe you could build on the opamp circuit.

@KissAnalog 2 года назад

Thank you Marcel! You are the first to comment on this video! What country are you in? I like your idea about how to use MicroCap - thank you!

@MarcelHuguenin 2 года назад

@@KissAnalog You're welcome Eddie. I am a Dutch retired IT guy in The Netherlands. I am not educated in this area but was always interested in this matter. Try to understand by watching lots of yt vids and using simulators such as Falstad and Microcap. Always fascinated.

@KissAnalog 2 года назад

Thanks Marcel! Great to hear from our friends in the Netherlands! Well, if you watch enough of these videos and I can keep them coming - then you will be a graduate of the Kiss University;)

@andymouse 2 года назад

Well I'm the second guy over here in the UK and would also like to see some simple design stuff using MicroCap and the 741 !....cheers.

@KissAnalog 2 года назад

Thank you! But you are the first from the UK! Nice job;) Thanks for your feedback! I'm just starting this OpAmp series and I'll actually show some real designs! I appreciate you!

@petersage5157 2 года назад

Very nice dive into the innards of a typical op amp! Well done. 10:38 In other op amp datasheets I've seen simplified equivalent circuits drawn with, for example, a single transistor having multiple emitters or multiple collectors. Is that similar to what you're showing here? I know of vacuum state devices where two active units share a common cathode and control grid but have separate anodes, so I've wondered if something similar was going on with these op amps or, as you say, the layout artists are taking artistic licenses in the name of economical layout.

@KissAnalog 2 года назад

Thanks for your feedback Peter! I think you are right - there is some artistic license taking place. They probably get tired of trying to make space to wire each transistor.

@versace885 2 года назад

HI Eddie, another great video. You are amazing at tutoring. Thank you for the video.

@KissAnalog 2 года назад

Thanks for your support! I appreciate you!

@electronicsprofessional3480 2 года назад

Very useful tutorial 👌 Thank you very much dear

@KissAnalog 2 года назад

Thanks so much! I appreciate you!

@nickayivor8432 2 года назад

Good Afternoon Kiss Anulog Tutorial great thank you 👏 👌 👍 From Nick Ayivor from London England UK 🇬🇧

@KissAnalog 2 года назад

Thank you! Great to hear from you!

@northernelectrocaremppt2103 2 года назад

Awesome presentation 👏 Thank you very much 👏

@KissAnalog 2 года назад

Thanks so much!

@JasonLeaman 2 года назад

Good video man !! Waves happy 2022 from Canada again :! I just also got my new amp running too !!

@KissAnalog 2 года назад

Thanks #Mr. Leamerz! Always great to hear from you! Nice work on your Amp!

@stevenbliss989 2 года назад

I have a lot of memories of the SERIOUSLY CLASSIC uA741, but common today NOT SO MUCH any more! The MC3082's and LM358's are the replacements today.

@stevenbliss989 2 года назад

But they are still easy to get at crazy low prices! :)

@KissAnalog 2 года назад

Thanks for your feedback! Funny thing is I still see a lot of the through hole parts in stock at vendors as well as the old military metal can (TO99-8) parts;)

@stevenbliss989 2 года назад

@@KissAnalog Save the metal can ones, they might be collector's items one day! Metal can anything these days tends to be very pricey! Just try and buy a ua709 in a can, or the p/s classic ua723a, in DIP, let alone a can! And yeah the uA714's are easy to get and cost almost nothing (5-10c), but LM358/MC3082 are much more common, and can be had for < 5c. but I agree and would call all of them "jellybean" to this day.

@qzorn4440 2 года назад

wow. the thing i like about the 741 op-amp is because it is still around. 🥰 we have 741 PCBs 40 years old that are still working today 🥳while other PCBs the op-amps are obsolete and i have to reverse engineer it just for replacement ICs, errr 😕also, do you have a video on the Vishay IL300 opto-isolator IC for a +/- 0-10volt 1:1 amp ? 🤔 great video, thanks 👌⛷🥮☕ 🙂

@KissAnalog 2 года назад

Thanks for the great feedback! I think that is so true, the 741 was used in such popularity that its demand has kept it alive and well today;)

@jj74qformerlyjailbreak3 2 года назад

I ran into a schematic the other day using uA741 and I instantly thought Lm Weird 😂 seems like when I think of something like this, RU-vid usually whips up a video covering the topic. I swear 👁phone can read the mind. 🤔 😱

@__--JY-Moe--__ 2 года назад

yup! the English were wizard smart in EE!! R u gona build a pcb?? goo 1 Eddy!!

@KissAnalog 2 года назад

Thanks and I appreciate you! BTW, RU-vid scrubbed your comment from my last video. I saw it in my notifications and it was funny as always so I don't know why it was scrubbed (must have been a word that they filtered).

@doglucky1709 2 года назад

When targeting flying objects such as Avangard, it is best to first verify with digital circuits in order to specialize in analog processing rather than digital processing and promote the array of differential and integrator circuits.

@KissAnalog 2 года назад

Thanks for the great feedback! Is this because the Analog is faster - or more precise?

@doglucky1709 2 года назад

@@KissAnalog I think that the resources for grasping the situation include output information from CCD sensors, flight sounds, radar devices, and so on. It combines the high speed of analog circuits with flight path prediction, speed estimation, and cruising angle range using digital circuits. If we can roughly match in the three-dimensional space, we think that it can be deterred by issuing barrages and nets to the cruising destination in the advanced airspace. for our information.

@Ormaaj 2 года назад

All opamp simulations are crap. I have yet to find a model that isn't total crap. Macromodels are crap. Full transiator-level models are crap. Goofy code models (like ltspice OTAs) are crap. They're almost always lazily written with spice-default transistors with all zero junction capacitences and numerous bugs almost without exception.

@KissAnalog 2 года назад

Thanks for this feedback Daniel! When you simulate OpAmps, what would make the simulation better? I agree, the LTSpice models are simply behavior models for the most part (ideal at the best), so you need to be careful of what you expect. Behavior models simply behave as expected, so what's the good? Very little;)

@Ormaaj 2 года назад

@@KissAnalog Sorry not really feedback for your video. Showing a basic 741 model is perfectly fine for teaching. I'm just generally whining about the difficulty in doing a good simulation for design purposes. How to improve them? That's a complicated question (and I'm far from an expert). Eliminating the common bugs such as ground current leakage from within the subcircuit is a big and sometimes difficult one especially when that current is due to input capacitence which needs to be redirected to the output and supply pins in the correct ratios depending on input stage topology. Related to that is developing a good scheme for an internal reference (there are several ways to handle that such as by referencing everything to the output, or by level shifting the inputs relative to the circuit ground to name a few). Other common issues I've found are lack of a PSRR model, lack of nonlinearity or phase shifting in response to transient loads, and many unrealistic responses to variable biasing conditions. One of the many papers on enhancing opamp models is available from the qucs sourceforge page if you happen to be interested in that topic. qucs.sourceforge.net/docs/tutorial/opamp.pdf