Phono Preamplifier – an electronic circuit that equalizes and amplifies the analog output of the cartridge in a phonograph turntable where the output is increased to intensity equal to other audio sources like CDs and tapes and to restore the original signal, RIAA equalization is required.Recording Industry Association of America (RIAA) – the trade group that represents the recording industry in the United States.This is an example circuit utilized for the audio distribution amplifier using TL074.The circuit was designed to produce a hi-fi phono preamplifier circuit with RIAA equalization standard suitable for moving magnet cartridge that produces good sound. One of the uses of TL074 is the audio preamplifier.
The output of the fourth OP-AMP is obtained at pin no.
For the first OP-AMP, inverting input is applied at pin 2. The terminals or the pins used are pins no. We need two power supplies to operate TL074. The operational features of TL074 are shown as: Parameters Non-inverting input voltage to 4th OP-AMP Non-inverting input voltage to 3rd OP-AMP Non-inverting input voltage to 2nd OP-AMP Non-inverting input voltage to 1st OP-AMP
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