Semiconductor device for the reproduction of acoustic signals

Apparatus for producing an acoustic signal, comprising:

• first transducer means for receiving and converting an acoustic signal into a corresponding analog electrical signal,
• second transducer means for receiving and converting an analog electrical signal into a corresponding acoustic signal,
• analog memory means connected between said first and second transducer means and operable to store said corresponding analog electrical signal and deliver said storage signal to said second transducer means for acoustic reproduction,
• said analog memory means comprising a memory constructed of stacked-gate injection metal-oxide semi-conductor memory cells, and
• said memory means comprising
• a matrix including said memory cells, a plurality of word lines and a plurality of first and second bit lines,
• each of said memory cells comprising a gate connected to a respective word line, a floating gate, a drain connected to a respective first bit line and a source connected to a respective second bit line,
• a plurality of load transistors each including a source-drain path connected in series with a respective second bit line and a first potential and a gate connected to said first potential,
• a write line for receiving a write signal,
• a plurality of write transistors each including a source-drain path connected in series with the source-drain path of a respective load transistor and a gate connected to said write line,
• an information output line,
• a write mode transistor, a read mode transistor and an erase mode transistor, each of said mode transistors including a gate for receiving a respective write, read and erase signal and a source-drain path connected between said information output line and respective second, third and fourth potential,
• a plurality of bit lines selection transistors each including a gate for receiving a bit selection signal and a source-drain path connected between a respective second bit line and said information output line,
• programming means for deriving a programming signal from said analog signal,
• an address generator operable to produce word line and bit line addresses,
• a bit line decoder connected between said address generator and said gates of said bit line selection transistors, and
• a word line decoder connected between said word lines and said address generator, said word line decoder including means connected to said programming means and operable to apply the programming signal to said gates of said memory cells which are connected to a selected word line.