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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Cheapo recorders often don’t have a potentiometer where one can set the recording level. I don’t know what you plan to do with the part, but an obvious choice would be an audio compressor. That’s the one I linked to – it has no circuit in it. It looks datashdet the IC is intended to be used with cassette tape recorders. I don’t see that in the datasheet I linked to above – you must have a different one. Home Questions Tags Users Unanswered.

The application example on page 3 catasheet us some idea. How should I connect it? It’s a major feature of this chip, and I guess it’s assumed you know what it is as you chose the chip. Not really helpful in answering the question. Sign up using Facebook. Sign up using Email and Password. The ALC signal is taken from the output, via a diode and an external capacitor.

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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. Sign up or log in Sign up using Google. Email Required, but never shown. A variable-gain amplifier is a bit tricky to do without distortion, so datasehet it integrated into the preamplifier was a convenience for the system designer.

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.

Basically, there’s an RC combination that allows you to set how fast the IC will react to varying levels of the signal. If you look at the datasheet, there is an example application circuit: 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.

Dual Preamplifier With Alc

It won’t be super high-fidelity, but maybe good enough for a guitar stomp box. 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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BA datasheet, Pinout ,application circuits Dual Preamplifier With Alc

That means it’s a peak detector, whose level is then used to control the amplifier’s amplification. I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device:. I have a preamp rescued from an old stereo: It is the ROHM daatsheet form alldatasheet.

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Post as a guest Name. 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.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policy datwsheet, and that your continued use of the website is subject to these policies.

Fancy posting a link to it? What is ALC on a preamp? The same tape head is also used for both functions.

BA3308 Datasheet PDF

I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device: Don’t you just hate it when they do that? 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. Notice how the amplifier is used for amplifying for both recording and playback.