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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8941 датащи(PDF) 37 Page - Wolfson Microelectronics plc |
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WM8941 датащи(HTML) 37 Page - Wolfson Microelectronics plc |
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37 / 96 page  Pre Production WM8941 w PP, Rev 3.3, December 2007 37 ALCMIN Minimum Gain (dB) 000 -12 001 -6 010 0 011 6 100 12 101 18 110 24 111 30 Table 25 ALC Min Gain Values Note that if the ALC gain setting strays outside the ALC operating range, either by starting the ALC outside of the range or changing the ALCMAX or ALCMIN settings during operation, the ALC will immediately adjust the gain to return to the ALC operating range. It is recommended that the ALC starting gain is set between the ALCMAX and ALCMIN limits. ALC HOLD TIME (NORMAL MODE ONLY) In Normal mode, the ALC has an adjustable hold time which sets a time delay before the ALC begins its decay phase (gain increasing). The hold time is set by the ALCHLD register. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R33 ALC Control 2 7:4 ALCHLD 0000 ALC hold time before gain is increased. Table 26 ALC Hold Time If the hold time is exceeded this indicates that the signal has reached a new average level and the ALC will increase the gain to adjust for that new average level. If the signal goes above the threshold during the hold period, the hold phase is abandoned and the ALC returns to normal operation. |
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