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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Basically, there’s an RC combination that allows you to set how fast the IC will react to varying levels of the signal. Sign up using Email and Password. The same tape head is also used for both functions.
Not really helpful in answering the question. Home Questions Tags Users Unanswered. I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device: Sign up or log in Sign up using Google. Notice how the amplifier is used for amplifying for both recording and playback.
The application example on page 3 gives us some idea. Fancy posting a link to it? That’s the one I linked to – it has no circuit in it. Ha3308 means it’s a peak detector, whose level is then used to control the amplifier’s amplification. Sign up using Facebook.
I have a preamp rescued from an old stereo: So that looks very much like Automatic Level Control, though Audio Limiter Control is a close relative, if not exactly the same.
BA3308 Datasheet PDF
I don’t see that in the datasheet I linked to above – you must have a ba3380 one. It looks like the IC is intended to be used with cassette tape recorders.
The text next to Fig. Email Required, but never shown. 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.
The Dataseet signal is taken from the output, via a diode and an external capacitor. I don’t know what you plan to do with the part, but an obvious choice would be an audio compressor.
It’s a major feature of this chip, and I guess it’s assumed you know what it is as you chose the chip. What is ALC on a preamp?
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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. 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.
BA datasheet, Pinout ,application circuits Dual Preamplifier With Alc
It is the ROHM datasheet form alldatasheet. I have looked for meanings of ALC online, and I have found 2 possible meanings that would fit this device:. Cheapo recorders often don’t have a potentiometer where one can set the recording level. How should I connect it?