Description of the data path
GUPPY Technical Manual
V4.0.1
72
In CMOS cameras offset and gain are in reversed order compared to the CCD
cameras. Therefore the offset is also amplified. So after changing gain, white
balance may also be changed.
From the user's point of view, the white balance settings are made in register
80Ch of IIDC V1.3. This register is described in more detail on the next page.
Figure 33: Signal path of MT9V022 (Guppy with CMOS sensor)
x
Pixel output
(reset minus signal)
Offset correction
Voltage (Reg0x48 or
result of BLC)
V
REF
(Reg0x2C)
Gain Selection
(Reg0x35 or
result of AGC)
ADC Data
(9:0)
C2
C1
10 (12) bit ADC