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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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AS3412 Arkusz danych(PDF) 14 Page - ams-OSRAM AG |
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AS3412 Arkusz danych(HTML) 14 Page - ams-OSRAM AG |
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14 / 85 page  ams Datasheet Page 13 [v1-00] 2016-Apr-06 Document Feedback AS3412 − Detailed Description The cut-off frequency for this filter can be calculated with the following formula: The simulated frequency response for the microphone preamplifier with the recommended component values is shown in Figure 13. Figure 13: Simulated Microphone Frequency Response In application with PCB space limitations it is also possible to remove the capacitors CAC and connect MICACL and MICACR pins directly to AGND. In this configuration AC coupling of the QMICR and QMICL signals is recommended. Microphone Frequency Response: This graph shows the frequency response of the microphone preamplifier with different gain settings with CAC=10μF, CMIC=2.2μF and RMICIN=22kΩ. (EQ3) fcut off – 1 2 π RMICIN CMIC ⋅⋅ ⋅ ----------------------------------------------------- = -5 0 5 10 15 20 25 30 35 10 100 1k 10k f [Hz] 0dB 6dB 12dB 18dB 24dB 30dB |
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