DUAL EQULIAZER AMPLIFIER. WITH ALC. DESCRIPTION. The BA is a monolithic integrated circuit consisting of dual equalizer amplifier with ALC,and it . BA The BA and BAF are dual preamplifier ICs with built-in ALC circuits, and have been designed for use in stereo radio-cassette recorders and. BA IC PREAMP DUAL W/ALC 9SIP Rohm datasheet pdf data sheet FREE from Datasheet (data sheet) search for integrated circuits (ic).

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The application example on page 3 gives us some idea. Sign up using Email and Password. I na3308 a preamp rescued from an old stereo: Notice how the amplifier is used for amplifying for both recording and playback. I don’t know what you plan to do with the part, but an obvious choice would be an audio compressor.

Sign up or log in Sign up using Google. I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device:. That means it’s a peak detector, whose level is then used to control the amplifier’s amplification.

Home Questions Tags Users Unanswered. If they talk all the time about ALC, and fail to explain what it is, all I can say then is that the datasheet stinks. That’s the one I linked to – it has no circuit in ba308.

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Fancy posting a link to it? Post Your Answer Discard By datashewt “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Ba3308 you look at the datasheet, there is an example application circuit: There’s a block diagram that looks like the ALC picks up the output signal and uses it to adjust integrated potentiometers at the input pins of the forward path.

I don’t see that in the datasheet I linked to above – you must have a different one. The same tape head is also used for both functions. ALC automatic level control was an important function in tape recorders, as the signal had to be the datashdet level, strong enough to overcome noise but not too high to cause saturation.

BA 데이터시트(PDF) – Unisonic Technologies

What is ALC on a preamp? Sign up using Facebook. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. It won’t be super high-fidelity, but maybe good enough for a guitar stomp box.

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Dual Preamplifier With Alc

Basically, there’s an RC combination that allows you to set how fast the IC will react to varying levels of the xatasheet. It’s a major feature of this chip, and I guess it’s assumed you know what it is as you chose the chip.

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The ALC signal is taken from the output, via a diode and an external capacitor. Not really helpful in answering the question. It is the ROHM datasheet form alldatasheet. The text next to Fig. A variable-gain amplifier is a bit tricky to do without distortion, so having it integrated into the preamplifier was a convenience for the system designer. It looks like the IC is intended to be used with cassette tape recorders. I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device: Email Required, but never shown.

Instead, an circuit tries to adjust the level of the signal that is to be recorded such that it is neither too silent and vanishes in the tape noise, nor too loud so it would cause tape saturation distortion. Don’t you just hate it when they do that? How should I connect it?

So that looks very much like Automatic Level Control, though Audio Datasheey Control is a close relative, if not exactly the same. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Cheapo recorders often don’t have a potentiometer where one can set the recording level.