LM324로 만들수있을려나? 좀 다르네..
음질은 보장 못하지만 LM324로 한번 해보긴 할까?
8옴 스피커를 직접 구동할 정도는 된다고
The LM386 is a popular amp that can drive 8 Ohm speakers directly. It will get you about 1/2 W at 9V (although that is listed at 10% distortion, whereas the amp I posted has < 1%, so it can probably also put out 1/2 W at 10% distortion). |
[링크 : https://www.electronicspoint.com/threads/op-amp-for-speaker-circuit.268709/]
LM324가 최대 전류가 낮은 편이라 이어폰이 차라리 소리 더 크겠다..?!
An LM324 can output a peak current of 20mA. The RMS current is 14.1mA and the RMS power into an 8 ohm speaker is only 1.6mW. Earphones are much louder. The LM324 "power amplifier" applies a bias voltage of 6V to the speaker that might push the cone so far out of the magnetic gap that the speaker will perform like a rectifier. The DC current is high enough to melt a little speaker. |
[링크 : https://forum.allaboutcircuits.com/threads/connect-lm324-to-an-8-ohm-speaker.10589/]
LMx24, Quadruple Operational Amplifiers
[링크 : http://www.ti.com/lit/ds/symlink/lm324.pdf]
[링크 : http://blog.djjproject.com/83] <<<
LM386 Low Voltage Audio Power Amplifier
[링크 : http://www.ti.com/lit/ds/symlink/lm386.pdf]
LM3914 Dot/Bar Display Driver
[링크 : http://www.ti.com/lit/ds/symlink/lm3914.pdf]
LM3915 Dot/Bar Display Driver
[링크 : http://tronixstuff.com/wp-content/uploads/2013/12/LM3915-data-sheet.pdf]
Direct current:
In this amplifier clipping scenario, destabilisation of the power supply may result in sending a direct current into the speaker voice-coils.
[링크 : https://www.focal.com/en/why-do-voice-coils-burn-out]
3.7V 배터리를 이용한 오디오 앰프?
[링크 : https://electronics.stackexchange.com/questions/322577/lipo-powered-earphone-amp/322578]
input bias
[링크 : https://electronics.stackexchange.com/questions/15339/whats-input-bias-current-in-opamps]
[링크 : https://electronics....-difference-between-operational-differential-and-instrumentation-am]
[링크 : https://www.quora.com/What-is-the-difference-between-an-amplifier-and-an-op-amp]
A 클래스 앰프 - 출력소자에 항상 바이어스 전류가 흐르며
[링크 : http://shimans.tistory.com/121]
[링크 : https://electronics.stackexchange.com/questions/164595/difference-between-lm386-and-lm741]
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