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TDA7402 数据表(PDF) 25 Page - STMicroelectronics |
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TDA7402 数据表(HTML) 25 Page - STMicroelectronics |
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25 / 71 page ![]() TDA7402 Audioprocessor part 25/71 4.8 Subwoofer application Figure 15. Subwoofer application with LPF 80/120/160Hz and HPF 90/135/180Hz Both filters, the lowpass and the highpass-filter, have butterworth characteristics so that their cut off frequencies are not equal, but shifted by the factor 1.125 to get a flat frequency response. 4.9 Voice band application Figure 16. Voiceband application with HPF 300/450/600/750Hz and LPF 3k/6kHz dB Hz -50.0 -40.0 -30.0 -20.0 -10.0 0.0 10.0 100.0 1.0K 10.0K dB Hz -50.0 -40.0 -30.0 -20.0 -10.0 0.0 10.0 100.0 1.0K 10.0K |
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