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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How should I connect it? If they talk all the time about ALC, and fail to explain what it is, all Eatasheet can say then is that the datasheet stinks.
BA3308 Datasheet PDF
Basically, there’s an RC combination that allows you to set how fast the IC will react to varying levels of the signal. A variable-gain amplifier is a bit tricky to do without distortion, so having it ba33008 into the preamplifier was a convenience for the system designer.
It looks like the IC is intended to be used with cassette tape recorders. Instead, an circuit tries to adjust the level of the signal that is to be recorded such that it is neither too ddatasheet and vanishes in the tape noise, nor too loud so it would cause tape saturation distortion.
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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. I have a preamp rescued from an old stereo: I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device: So that looks very much like Automatic Level Control, though Audio Limiter Control is a close relative, if not exactly the same.
Post as a guest Name. Sign up using Email and Password. It’s a major feature of this chip, and I guess it’s assumed you know what it is as you chose the chip. I don’t see that in the datasheet I linked to above – you must have a different one. Fancy posting a link to it? The same tape head is also used for both functions.
Home Questions Tags Users Unanswered. The ALC signal is taken from the output, via a diode and an external capacitor. Sign up or log in Sign up using Google.
The text datashee to Fig. Email Required, but never shown. The application example on page 3 gives us some idea.
It is the ROHM datasheet form alldatasheet. That means it’s a peak detector, whose level is then used to control the amplifier’s amplification. What is ALC on a preamp?
Dual Preamplifier With Alc
I don’t know what you plan to do with the part, but an obvious choice would be an audio compressor.