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參數(shù)資料
| 型號： | M64283FP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | Image Sensor (Artificial Retina Chip) |
| 中文描述： | 圖像傳感器（人造視網(wǎng)膜芯片） |
| 文件頁數(shù)： | 14/36頁 |
| 文件大?。?/td> | 320K |
| 代理商： | M64283FP |
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Mitsubishi Integrated Circuit <Linear IC>
M64283FP
Image Sensor (Artificial Retina Chip)
14/
35
Specifications and information in this document are subject to change without notice.
Ver. 2. 2. 3
07/22/1998
Semiconductor Technical Data
MITSUBISHI
12.5.2. Automatic Black Level Calibration Register - AZ (1 bit)
As shown in Figure 6, the output voltage VOUT (amplitude) becomes minimum (maximum) in the dark
state: the incident light is 0lx (black level). On the other hand, the output voltage VOUT becomes the same
as Vref in the light state: the incident light is very strong and the pixels are saturated (saturation level). The
black level is calibrated so that the output amplitude is in proportion to the incident light intensity (the
output amplitude becomes large as the incident light increases). As shown in Figure 6, the output voltage
VOUT, in which black level has been calibrated by biasing the saturation voltage Vsat, becomes Vref in the
dark state, and its amplitude becomes maximum in the light state. Figure 7 shows a scheme of automatic
black level calibration. In this scheme, the difference voltage between the effective pixel and the dark pixel
is put out. By using this circuit, shift of the saturation voltage Vsat attributed to exposure time can be
calibrated automatically. The automatic black level calibration is enabled in any image capture mode and
works when the AZ register is "H" (an initial value of AZ: L).
Figure 7. Structure of Automatic Black Level calibration Circuit
Parameter
AZ
0
1
Automatic black level control
Disable
Enable
128
×
128 pixel array
V
Dark pixel
column
Horizontal control circuit
I
OB
Vout
Vref
AZ
READ
I
P
I
P-
I
OB
-
+
-
+
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