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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TAS3103ADBT датащи(PDF) 73 Page - Texas Instruments |
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TAS3103ADBT датащи(HTML) 73 Page - Texas Instruments |
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73 / 154 page  3−10 3.4 Biquad Filters The TAS3103A has 73 biquad filters . The breakout of the biquad filters per functional element is given in Table 3−1. Table 3−1. Biquad Filter Breakout FUNCTION BIQUAD FILTERS SUBADDRESS 3D effects block 24 0x34−0x4B Monaural channel CH1 12 0x4F−0x5A Monaural channel CH2 12 0x5B−0x66 Monaural channel CH3 12 0x67−0x72 0xA6−CH1 Loudness processing 3 0xAB−CH2 Loudness processing 3 0xB0−CH3 Spectrum analyzer/VU meter 10 0xBC−0xC5 All 73 biquad filters are second-order direct-form I structures. A block diagram of the structure of the biquad filter is shown in Figure 3−11. b 0 b 1 b 2 a1 a2 28 28 28 28 28 48 76 76 48 48 76 76 76 48 48 76 Magnitude Truncation 48 z−1 z−1 z−1 z−1 Σ NOTE: All gain coefficients 5.23 numbers. Biquad Filter Coefficient Subaddress Format Biquad Filter Structure m s b S Slave Addr Ack Subaddr Ack xxx 0000 Ack xxxxxxxx Ack xxxxxxxx Ack xxxxxx l s b Ack a1 m s b xxx 0000 Ack xxxxxxxx Ack xxxxxxxx Ack xxxxxx l s b Ack a2 m s b xxx 0000 Ack xxxxxxxx Ack xxxxxxxx Ack xxxxxx l s b Ack b0 m s b xxx 0000 Ack xxxxxxxx Ack xxxxxxxx Ack xxxxxx l s b Ack b2 m s b xxx 0000 Ack xxxxxxxx Ack xxxxxxxx Ack xxxxxx l s b Ack b1 NOTE: Each biquad filter has one subaddress which contains the mixer gain coefficients a1, a2, b0, b1, b2 Figure 3−11. Biquad Filter Structure and Coefficient Subaddress Format The transfer function for the biquad filter is given by: V OUT (z) V IN(z) + b 0 ) b1z −1 ) b 2z −2 1 * a 1z −1 * a 2z −2 Note that the signs of an coefficients are opposite from Matlab-generated coefficients. |
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