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参数资料
| 型号： | TCD2953CF |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, CDMA32 |
| 封装： | CERAMIC, LCC-32 |
| 文件页数： | 11/15页 |
| 文件大小： | 273K |
| 代理商： | TCD2953CF |
TCD2953CF
2003-06-04
5
Note 10: Random noise is defined as the standard deviation (sigma) of the output level difference between two
adjacent effective pixels under no illumination (i.e. darkconditions) calculated by the following procedure.
(1)
Two adjacent pixels (pixel n and n + 1) in one reading are fixed as measurement points.
(2)
Each of the output level at video output periods averaged over 200 ns period to get V (n) and V (n + 1).
(3)
V (n + 1) is subtracted from V (n) to get V.
V = V (n) V (n + 1)
(4)
The standard deviation of V is calculated after procedure (2) and (3) are repeated 30 times (30
readings).
∑
30
1
=
i
|
Vi
|
30
1
=
V
∑
30
1
i
2
)
V
(
30
1
i
=
|
=
σ
(5)
Procedure (2), (3) and (4) are repeated 10 times to get sigma value.
(6)
10 sigma values are averaged.
∑
10
1
j
10
1
=
σ
(7)
σ value calculated using the above procedure is observed
2 times larger than that measured
relative to the ground level. So we specify random noise as follows.
σ
2
1
ND
=
video output
200 ns
pixel (n)
pixel (n
+ 1)
V
Output waveform
(effective pixels under
dark condition)
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