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AS3412 데이터시트(PDF) 14 Page - ams-OSRAM AG

부품명 AS3412
상세설명  Ultra Small ANC Speaker Driver
PDF  85 Pages
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제조업체  AMSOSRAM [ams-OSRAM AG]
홈페이지  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3412 데이터시트(HTML) 14 Page - ams-OSRAM AG

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ams Datasheet
Page 13
[v1-00] 2016-Apr-06
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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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