UPD3778 datasheet(13/24 Pages) NEC

tên linh kiện	UPD3778

Giải thích chi tiết về linh kiện	10600 PIXELS x 3 COLOR CCD LINEAR IMAGE SENSOR

PDF	24 Pages

Scroll/Zoom	100%

nhà sản xuất	NEC [NEC]

Trang chủ	http://www.nec.com/

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13 / 24 page

µPD3778

Data Sheet S14374EJ1V0DS00

10. Random noise (CDS):

σCDS

Random noise (CDS)

σCDS is defined as the standard deviation of a valid pixel output signal with 100 times (=

100 lines) data sampling at dark (light shielding). This is measured by the following procedure.

1. One valid photocell in one reading is fixed as measurement point.

2. The output level is measured during the Reset feed-through period which is averaged over 100 ns to get “VDi”.

3. The output level is measured during the Video output time averaged over 100 ns to get “VOi”.

4. The correlated double sampling output is defined by “VCDSi = VDi – VOi”.

5. Repeat the above procedure (1 to 4) for 100 times (= 100 lines).

6. Calculate the standard deviation

σCDS using the following formula.

VOUT

Reset feed-through

Video output

σCDS (mV) =

, V =

i=1

100

(VCDSi – V)2

i=1

100

VCDSi

100

UPD3778 bảng dữ liệu(PDF) 13 Page - NEC