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AN2583 数据表(PDF) 6 Page - STMicroelectronics

部件名 AN2583
功能描述  M41T00AUD real-time clock with audio
PDF  18 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN2583 数据表(HTML) 6 Page - STMicroelectronics

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Audio characteristics
AN2583
6/18
Figure 6.
Voltage output spectrum
The other THD calculation method compares the voltages.
Since P is proportional to V2, this second method amounts to being the square root of the
first.
Because THD is generally a number less than 1, THDV, being the square root of THDP , will
be a larger number than THDP .
0
f
(VOUT)
f0
2f0
3f0
4f0
5f0
6f0
7f0
F
V1
V2
V3
V4
V5
V6
V7
ai13932
1
2
7
2
6
2
5
2
4
2
3
2
2
2
V
V
V
V
V
V
V
V
frequency
l
fundamenta
of
voltage
voltages)
(harmonic
THD
L
+
+
+
+
+
+
=
=
∑
1
2
6
2
5
2
4
2
3
2
2
1
2
7
2
6
2
5
2
4
2
3
2
2
V
V
V
V
V
V
V
R
1
R
1
V
V
V
V
V
V
V
THD
L
+
+
+
+
+
⋅
=
+
+
+
+
+
+
=
1
7
6
5
4
3
2
1
2
7
2
6
2
5
2
4
2
3
2
2
P
P
P
P
P
P
P
R
V
R
V
R
V
R
V
R
V
R
V
R
V
L
L
+
+
+
+
+
+
=
+
+
+
+
+
=
P
V
THD
THD
=



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