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WM8985GEFL/R 데이터시트(PDF) 54 Page - Wolfson Microelectronics plc |
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WM8985GEFL/R 데이터시트(HTML) 54 Page - Wolfson Microelectronics plc |
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54 / 118 page ![]() WM8985 Pre-Production w PP, Rev 3.5, March 2007 54 Figure 22 Noise Gate Operation OUTPUT SIGNAL PATH The WM8985 output signal paths consist of digital application filters, up-sampling filters, stereo Hi-Fi DACs, analogue mixers, stereo headphone and stereo line/mono/midrail output drivers. The digital filters and DAC are enabled by register bits DACENL and DACENR. The mixers and output drivers can be separately enabled by individual control bits (see Analogue Outputs). Thus it is possible to utilise the analogue mixing and amplification provided by the WM8985, irrespective of whether the DACs are running or not. The WM8985 DACs receive digital input data on the DACDAT pin. The digital filter block processes the data to provide the following functions: Digital volume control Graphic equaliser A digital peak limiter Sigma-Delta Modulation High performance sigma-delta audio DAC converts the digital data into an analogue signal. |
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