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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Email Required, but never shown. 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. 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. The ALC signal is taken from the output, via a diode and an external capacitor.

That means it’s a peak detector, whose level is then used to control the amplifier’s amplification. It looks like the IC is intended to be used with cassette tape recorders. Sign up using Email and Password. I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device:.

BA3308 Datasheet PDF

So that looks very much like Automatic Level Control, though Audio Limiter Control is a close relative, if not exactly the same. The application example on page 3 gives us some idea.

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Sign up or log in Sign up using Google. Basically, there’s an RC combination that allows you to set how fast the IC will react to varying levels of the signal. Not really helpful in answering the question.

BA 데이터시트(PDF) – Unisonic Technologies

I have a preamp rescued from an old ba33308 It’s a major feature of this chip, and I guess it’s assumed you know what it is as you chose the chip.

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.

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The text next to Fig. There’s a block diagram that datssheet like the ALC picks up the output signal and uses it to adjust integrated potentiometers at the input pins of the forward path. Fancy posting a link to it? That’s the one I linked to – it has no circuit in it. It won’t be super high-fidelity, but maybe good enough for a guitar stomp box.

BA 데이터시트(PDF) – Rohm

What is ALC on a preamp? 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. The same tape head is also used for both functions. Don’t you just hate it when they do that? By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Home Questions Tags Users Unanswered.

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Notice how the amplifier is used for amplifying for both recording and playback. I don’t see adtasheet in the datasheet I linked to above – you must have a different one.

I don’t know what you plan to do with the part, but an obvious choice would be an audio compressor. I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device: It is the ROHM datasheet form alldatasheet. A variable-gain amplifier is a bit tricky to do without distortion, so having it integrated into the preamplifier was datasheey convenience for the system designer.

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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.

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