Hello every one how are you? I am looking for a scheme for a video amplifier using opamp, I want make the video sign that comes from video games as Nintendo 8bits, Sega Genesis, Atari and others have some gain, eliminate some video ghosts signs, bars, anyway, make the video result seems better, clear improved... ancious waiting help...great fortune for all
And please let me thank you for all these instructive videos, some people may need to buy a metal detector and go into the field searching for lost treasures, but finding your channel and others similar, is a better experience for me! These are true treasures for people with a heart for electronics! Thanks!
...when you feed the signal in the speaker driver op amp? That is the heart of the matter, for me at least. And also, if the OPA627, AD797 and the LM4562 are the best op amps to use as preamps, are there similar chips that stand out for their great characteristics as speaker drivers? Any suggestion would be highly appreciated. Having watched your videos on audio amplifiers, is it better to use a single chip as spear driver, or the specially designed two transistors + circuitry? Huge thanks!
@cd4600 There are hundreds of chips available for driving the speaker (power amp stage). The best IC to use depends on many factors including the power (watts) you need.
...understand is, if it is possible to use the same op amp for the speaker driver stage? I mean, you talk here about the LM4562, which is the equivalent of the AD797, and the notorious OPA627 in terms of performance, but since I am a beginner, I don't quite understand if you plan on using the LM4562 for the preamp stage, or the speaker driver stage? So, if you are indeed using the LM4562 as a preamp, how do you avoid loosing all it's excellent characteristics (low noise, high slew rate etc)...
@cd4600 No, ICs like the LM4562 are small signal devices. they can't power the speaker directly. There are many good audio power ICs that will work. Like I said, it depends on what you need. For a small power amplifier, you can use an LM386 or several other choices of ICs available.
Hi, I'm a beginner who wants to build a nice ultra low noise amplifier which takes the signal from a plain electret microphone, and drives a single 4 ohm, 1 watt speaker. I do understand that I need two stages, one to pick up the faint sound from the mike and amplify it, say a hundred times, and the second stage, with a second op-amp that will constitute the driver for the speaker, am I right? Since I want ultra low noise, I've selected an AD797 op amp for the first stage, but what I don't...
Thanks. This made a lot more sense than the last guy's video.
imjinc2k 2 days ago
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Hello every one how are you? I am looking for a scheme for a video amplifier using opamp, I want make the video sign that comes from video games as Nintendo 8bits, Sega Genesis, Atari and others have some gain, eliminate some video ghosts signs, bars, anyway, make the video result seems better, clear improved... ancious waiting help...great fortune for all
HeavyMetal80sRules 2 weeks ago
Thank you so much for the vidio, i now finally understand opp amp. Thank you soooooooo much
TheBlobbywobby 1 month ago
Make more videos on Op Amps and others! hehe... good tutorial! =>
santiks 2 months ago
And please let me thank you for all these instructive videos, some people may need to buy a metal detector and go into the field searching for lost treasures, but finding your channel and others similar, is a better experience for me! These are true treasures for people with a heart for electronics! Thanks!
cd4600 9 months ago
@cd4600 Hi and thanks for the positive comments!
vegmatic1966 9 months ago
...when you feed the signal in the speaker driver op amp? That is the heart of the matter, for me at least. And also, if the OPA627, AD797 and the LM4562 are the best op amps to use as preamps, are there similar chips that stand out for their great characteristics as speaker drivers? Any suggestion would be highly appreciated. Having watched your videos on audio amplifiers, is it better to use a single chip as spear driver, or the specially designed two transistors + circuitry? Huge thanks!
cd4600 9 months ago
@cd4600 There are hundreds of chips available for driving the speaker (power amp stage). The best IC to use depends on many factors including the power (watts) you need.
vegmatic1966 9 months ago
...understand is, if it is possible to use the same op amp for the speaker driver stage? I mean, you talk here about the LM4562, which is the equivalent of the AD797, and the notorious OPA627 in terms of performance, but since I am a beginner, I don't quite understand if you plan on using the LM4562 for the preamp stage, or the speaker driver stage? So, if you are indeed using the LM4562 as a preamp, how do you avoid loosing all it's excellent characteristics (low noise, high slew rate etc)...
cd4600 9 months ago
@cd4600 No, ICs like the LM4562 are small signal devices. they can't power the speaker directly. There are many good audio power ICs that will work. Like I said, it depends on what you need. For a small power amplifier, you can use an LM386 or several other choices of ICs available.
vegmatic1966 9 months ago
Hi, I'm a beginner who wants to build a nice ultra low noise amplifier which takes the signal from a plain electret microphone, and drives a single 4 ohm, 1 watt speaker. I do understand that I need two stages, one to pick up the faint sound from the mike and amplify it, say a hundred times, and the second stage, with a second op-amp that will constitute the driver for the speaker, am I right? Since I want ultra low noise, I've selected an AD797 op amp for the first stage, but what I don't...
cd4600 9 months ago