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AK7750 Datasheet(PDF) 3 Page - Asahi Kasei Microsystems |
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AK7750 Datasheet(HTML) 3 Page - Asahi Kasei Microsystems |
3 / 77 page ![]() [ASAHI KASEI] [AK7750] [MS0296-E-00] 3 2005/03 Block Diagram (1) Hands-Free Mode Diagram D/A D/A iFFT Spectrum Subtraction FFT ARM Processor Noise Canceller Tel. Line RAM ROM Digital OUT(8ch) µP I/F EEPROM Digital IN(8ch) PLL Filter + Echo Canceller VAD Filter voice SW VAD Tel. Line DSP Block I/F Mic. Speaker Filter Ctrl. A/D A/D Block Diagram (2) Audio Surround Mode Diagram D/A D/A iFFT Spectrum Subtraction FFT ARM Processor Noise Canceller Audio_in RAM ROM Digital OUT(6(8))ch) µP I/F EEPROM Digital IN(8(10))ch) PLL Sound processing (EQ,Surround,…) VAD voice SW Speaker DSP Block I/F Audio_in Speaker A/D A/D OFF Block Diagram |