U4091B processor equivalent, programmable telephone audio processor.
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Speech circuit with anti-clipping Tone ringer interface with dc / dc converter Speaker amplifier with anti-distortion Power supply management, regulated, unregula.
Feature phone, answering machine, fax machine, speaker phone
Speech circuit Voice switch
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Audio amplifier
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The programmable telephone audio processor U4091B is a linear integrated circuit for use in feature phones, answering machines and fax machines. It contains the speech circuit, tone ringer interface with dc/dc converter, sidetone equivalent and ear p.
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