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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8978GEFL/V датащи(PDF) 36 Page - Wolfson Microelectronics plc |
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WM8978GEFL/V датащи(HTML) 36 Page - Wolfson Microelectronics plc |
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36 / 78 page  WM8978 Product Preview w PP Rev 1.7 January 2005 36 5-BAND GRAPHIC EQUALISER A 5-band graphic EQ is provided, which can be applied to the ADC or DAC path, together with 3D enhancement, under control of the EQ3DMODE register bit. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R18 EQ Control 1 8 EQ3DMODE 1 0 = Equaliser and 3D Enhancement applied to ADC path 1 = Equaliser and 3D Enhancement applied to DAC path Table 22 EQ and 3D Enhancement DAC or ADC Path Select The equaliser consists of low and high frequency shelving filters (Band 1 and 5) and three peak filters for the centre bands. Each has adjustable cut-off or centre frequency, and selectable boost (+/- 12dB in 1dB steps). The peak filters have selectable bandwidth. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 4:0 EQ1G 01100 (0dB) Band 1 Gain Control. See Table 28 for details. R18 EQ Band 1 Control 6:5 EQ1C 01 Band 1 Cut-off Frequency: 00=80Hz 01=105Hz 10=135Hz 11=175Hz Table 23 EQ Band 1 Control REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 4:0 EQ2G 01100 (0dB) Band 2 Gain Control. See Table 28 for details. 6:5 EQ2C 01 Band 2 Centre Frequency: 00=230Hz 01=300Hz 10=385Hz 11=500Hz R19 EQ Band 2 Control 8 EQ2BW 0 Band 2 Bandwidth Control 0=narrow bandwidth 1=wide bandwidth Table 24 EQ Band 2 Control REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 4:0 EQ3G 01100 (0dB) Band 3 Gain Control. See Table 28 for details. 6:5 EQ3C 01 Band 3 Centre Frequency: 00=650Hz 01=850Hz 10=1.1kHz 11=1.4kHz R20 EQ Band 3 Control 8 EQ3BW 0 Band 3 Bandwidth Control 0=narrow bandwidth 1=wide bandwidth Table 25 EQ Band 3 Control |
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