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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I have a preamp rescued from an old stereo: The text next to Fig.
BA3308 Datasheet PDF
So that looks very much like Automatic Level Control, though Audio Limiter Control is a close relative, if datasheeet exactly the same. That means it’s a peak detector, whose level is then used to control the amplifier’s amplification.
How should I connect it? If you look at the datasheet, there is an example application circuit: It is the ROHM datasheet form alldatasheet. It looks like the IC is intended to be used with cassette tape recorders.
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BA IC PREAMP DUAL W/ALC 9SIP Rohm datasheet pdf data sheet FREE from
Post as a guest Name. That’s the one I linked to – it has no circuit in it. I don’t see that in the datasheet I linked to above – you must have a different one.
What is ALC on a preamp? – Electrical Engineering Stack Exchange
The application example on page 3 gives us some idea. If they talk all the time about ALC, and fail to explain what it is, all I can say then is that the datashfet stinks.
Sign up or log in Sign up using Google. ALC automatic level control was an important function in tape recorders, as the signal had to b3308 the right level, strong enough to overcome noise but not too high to cause saturation.
Don’t you just hate it when they do that?
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.
It’s ha3308 major feature of this chip, and I guess it’s assumed you know what it is as you chose the chip. Email Required, but never shown.
It won’t be super high-fidelity, but maybe good enough for a guitar stomp box. Sign up using Facebook. I dataasheet looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device: The ALC signal is taken from the output, ba33088 a diode and an external capacitor.
Fancy posting a link to it? I don’t know what you plan to do with the part, but an obvious choice would be an audio compressor. Cheapo recorders often don’t have a potentiometer where one can set the recording level. 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?
Notice how the amplifier is used for amplifying for both recording and playback.