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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So that looks very much like Automatic Level Control, though Audio Limiter Control is a close relative, if not exactly the same. The same tape ba308 is also used for both functions.
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.
BA3308 Datasheet PDF
Sign up using Email and Password. There’s a block dattasheet 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. Home Questions Tags Users Unanswered. Cheapo recorders often don’t have a potentiometer datasjeet one can set the recording level. 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 using Facebook. I don’t see that in the datasheet I linked to above – you must have a different one. That means it’s a peak detector, whose level is then used to control the amplifier’s amplification.
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BA Datasheet(PDF) – Rohm
Sign up or log in Sign up using Google. 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. Fancy posting a link to it?
BA 데이터시트(PDF) – Rohm
Basically, there’s an RC combination that allows you to set how fast the IC will react to varying levels of the signal. I have a preamp rescued from an old stereo: It won’t be super high-fidelity, but maybe datashete enough for a guitar stomp box.
It looks like the IC is intended to be used with cassette tape recorders. The text next to Fig. Notice how bz3308 amplifier is used for amplifying for both recording and playback. How should I connect it?
Dual Preamplifier With Alc
The ALC signal is taken from the output, via a diode and an external capacitor. Post as a guest Name. 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. The application example on page 3 gives us some idea.