UPD3720A Просмотр технического описания (PDF) - NEC => Renesas Technology

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производитель

UPD3720A

2700 PIXELS × 3 COLOR CCD LINEAR IMAGE SENSOR

NEC => Renesas Technology 

µPD3720A

9. Register Imbalance: RI

The rate of the difference between the averages of the output voltage of Odd and Even pixels, against the average

output voltage of all the valid pixels.

n

2

Σ 2

n

(V2j – 1 – V2j)

RI (%) =

j=1

n

Σ 1

n

Vj

j=1

× 100

n : Number of valid pixels

Vj : Output voltage of each pixel

10. Random noise: σ

Random noise σ is defined as the standard deviation of a valid pixel output signal with 100 times (=100 lines)

data sampling at dark (light shielding).

100

σ=

Σ (Vi – V)2

i=1

Σ 1 100

, V=

Vi

100 i=1

100

Vi : A valid pixel output signal among all of the valid pixels for each color

VOUT

V1

V2

V100

line 1

line 2

line 100

This is measured by the DC level sampling of only the signal level, not by CDS (Correlated Double Sampling).

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