This part is a kind of semiconductor called LM1036.

Function of this product has DUAL DC OPERATED TONE/VOLUME BALANCE CIRCUITS.

Manufacturers : National Semiconductor

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LM1036 Dual DC Operated Tone/Volume/Balance Circuit January 1995 LM1036 Dual DC Operated Tone/Volume/Balance Circuit General Description The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. An additional control input allows loudness compensation to be simply effected. Four control inputs provide control of the bass, treble, balance and volume functions through application of DC voltages from a remote control system or, alternatively, from four potentiometers which may be biased from a zener regulated supply provided on the circuit. Each tone response is defined by a single capacitor chosen to give the desired characteristic. Features Wide supply voltage range, 9V to 16V Large volume control range, 75 dB [ ... ]

LM1036 PDF Datasheet Download