BA3308 DATASHEET PDF

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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How should I connect it? If they talk all the time about ALC, and fail to explain what it is, all Eatasheet can say then is that the datasheet stinks.

BA3308 Datasheet PDF

Basically, there’s an RC combination that allows you to set how fast the IC will react to varying levels of the signal. A variable-gain amplifier is a bit tricky to do without distortion, so having it ba33008 into the preamplifier was a convenience for the system designer.

It looks like the IC is intended to be used with cassette tape recorders. Instead, an circuit tries to adjust the level of the signal that is to be recorded such that it is neither too ddatasheet and vanishes in the tape noise, nor too loud so it would cause tape saturation distortion.

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ALC automatic level control was an important function in tape recorders, as the signal had to be the right level, strong enough to overcome noise but not too high to cause saturation. I have a preamp rescued from an old stereo: I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device: So that looks very much like Automatic Level Control, though Audio Limiter Control is a close relative, if not exactly the same.

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Post as a guest Name. Sign up using Email and Password. It’s a major feature of this chip, and I guess it’s assumed you know what it is as you chose the chip. I don’t see that in the datasheet I linked to above – you must have a different one. Fancy posting a link to it? The same tape head is also used for both functions.

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. Sign up using Facebook. That’s the one I linked to – it has no circuit in it. If you look at the datasheet, there is an example application circuit: Cheapo recorders often don’t have a potentiometer where one can set the recording level.

Home Questions Tags Users Unanswered. The ALC signal is taken from the output, via a diode and an external capacitor. Sign up or log in Sign up using Google.

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I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device:. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The text datashee to Fig. Email Required, but never shown. The application example on page 3 gives us some idea.

It is the ROHM datasheet form alldatasheet. That means it’s a peak detector, whose level is then used to control the amplifier’s amplification. What is ALC on a preamp?

Dual Preamplifier With Alc

Notice how the amplifier is used for amplifying for both recording and playback. Post Your Answer Discard 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. Not really helpful in answering the question. Don’t you just hate it when they do that? 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 know what you plan to do with the part, but an obvious choice would be an audio compressor.

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