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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Don’t you just hate it when they do that? How should I connect it? If they talk all the time about ALC, and datxsheet to explain what it is, all I can say then is that the datasheet stinks.
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BA Datasheet(PDF) – Rohm
It looks like the IC is intended to be used with cassette tape recorders. Sign up or log in Sign up using Google. The text next to Fig. The ALC signal is taken from the output, via a diode and an datasbeet capacitor. The same tape head is also used for both functions.
So that looks very much like Automatic Level Control, though Audio Limiter Control is a close relative, if not exactly the same.
Dual Preamplifier With Alc
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.
Cheapo recorders often don’t have datashheet potentiometer where one can set the recording level. If you look at ba308 datasheet, there is an example application circuit: 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.
I don’t know what you plan to do with the part, but an obvious choice would be an audio compressor. The application example on page 3 gives us some idea. Post as a guest Name. There’s a block diagram that datasyeet like the ALC picks up the output signal and uses it to adjust integrated potentiometers at the input pins of the forward path.
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. I don’t see that in the datasheet I linked to above – you must have a different one. Fancy posting a link to it?
BA3308 Datasheet PDF
Home Questions Tags Users Unanswered. ALC automatic level control was an important function in tape recorders, as vatasheet signal had to be the right level, strong enough to overcome noise but not too high to cause saturation.
Basically, there’s an RC combination that allows you to set how fast the IC will react to varying levels of the signal.
What is ALC on a preamp? – Electrical Engineering Stack Exchange
It won’t be datasheeet high-fidelity, but maybe good enough for a guitar stomp box. Not really helpful in answering the question. I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device: Notice how the amplifier is used for amplifying for both recording and playback.