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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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WM8985GEFL/R 데이터시트(PDF) 49 Page - Wolfson Microelectronics plc |
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WM8985GEFL/R 데이터시트(HTML) 49 Page - Wolfson Microelectronics plc |
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49 / 121 page  Production Data WM8985 w PD, Rev 4.6, July 2009 49 MINIMUM AND MAXIMUM GAIN The ALCMIN and ALCMAX register bits set the minimum/maximum gain value that the PGA can be set to whilst under the control of the ALC. This has no effect on the PGA when ALC is not enabled. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R32 ALC Control 1 5:3 ALCMAX 111 Set Maximum Gain of PGA 2:0 ALCMIN 000 Set minimum gain of PGA Table 23 ALC Max/Min Gain In normal mode, ALCMAX sets the maximum boost which can be applied to the signal. In limiter mode, ALCMAX will normally have no effect (assuming the starting gain value is less than the maximum gain specified by ALCMAX) because the maximum gain is set at the starting gain level. ALCMIN sets the minimum gain value which can be applied to the signal. Figure 23 ALC Min/Max Gain ALCMAX Maximum Gain (dB) 111 35.25 110 29.25 101 23.25 100 17.25 011 11.25 010 5.25 001 -0.75 000 -6.75 Table 24 ALC Max Gain Values |
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