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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8945ECS/R датащи(PDF) 40 Page - Wolfson Microelectronics plc |
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WM8945ECS/R датащи(HTML) 40 Page - Wolfson Microelectronics plc |
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40 / 169 page  WM8945 Production Data w PD, May 2011, Rev 4.1 40 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 12:8 DRC_KNEE2_OP 00000 Output signal at the Noise Gate threshold ‘Knee2’. 00000 = -30dB 00001 = -31.5dB 00010 = -33dB … (-1.5dB steps) 11110 = -75dB 11111 = -76.5dB Only applicable when DRC_KNEE2_OP_ENA = 1. 7:3 DRC_KNEE_OP 00000 Output signal at the Compressor ‘Knee1’. 00000 = 0dB 00001 = -0.75dB 00010 = -1.5dB … (-0.75dB steps) 11110 = -22.5dB 11111 = Reserved 2:0 DRC_HI_COMP 011 Compressor slope (upper region) 000 = 1 (no compression) 001 = 1/2 010 = 1/4 011 = 1/8 100 = 1/16 101 = 0 110 = Reserved 111 = Reserved R35 (23h) DRC Control 7 9:8 DRC_NG_EXP 00 Noise Gate slope 00 = 1 (no expansion) 01 = 2 10 = 4 11 = 8 7:5 DRC_LO_COMP 000 Compressor slope (lower region) 000 = 1 (no compression) 001 = 1/2 010 = 1/4 011 = 1/8 100 = 0 101 = Reserved 11X = Reserved Table 17 DRC Control Registers GAIN LIMITS The minimum and maximum gain applied by the DRC is set by register fields DRC_MINGAIN, DRC_MAXGAIN and DRC_NG_MINGAIN. These limits can be used to alter the DRC response from that illustrated in Figure 17. If the range between maximum and minimum gain is reduced, then the extent of the dynamic range control is reduced. The minimum gain in the Compression regions of the DRC response is set by DRC_MINGAIN. The minimum gain in the Noise Gate region is set by DRC_NG_MINGAIN. The minimum gain limit prevents excessive attenuation of the signal path. The maximum gain limit set by DRC_MAXGAIN prevents quiet signals (or silence) from being excessively amplified. |
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