IR3Y30M データシートの表示（PDF） - Sharp Electronics

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IR3Y30M

CCD Signal Processors for B/W CCD Cameras

Sharp Electronics 

FUNCTIONAL OPERATION

CDS Circuit

The feed-through level of the input signal is

clamped by the clamp circuit. Then the signal

period is sampled and other periods are held by the

sample and hold circuit, so that signals can be

obtained.

CCD Signal

FCDS

FS

CDS OUT

Highlight Clip Circuit

Before the AGC circuit, excessive signals of more

than approximately 0.5 Vp-p are clipped.

AGC Amplifier Circuit

The amplitude of output signals from the AGC

amplifier is externally detected and the gain is

controlled with control signals from the AGC

operational amplifier. Decreasing voltage at pin 41

to 0.62 V or less causes the amplifier to be fixed to

0 dB.

LPF Circuit

The characteristics can be controlled with an

external resistor at pin 35. Increasing the resistor to

220 k$ or more allows signals passing over the

LPF to be output.

Gamma and Knee Corrections Circuits

In order to comply with the characteristics of CRT,

the high-bright part is suppressed. Pin 29 and 30

can be used to control this suppression. If voltage

at pin 30 is increased to 4 V or more gamma will

be 1.

IR3Y30M/M1

Exposure Circuit

Signals which have not been processed by AGC

are amplified, suppressed by gamma correction,

and then output. Control signals can be generated

by inputting the above signals to pin 10 after

detecting them.

Aperture Circuit

The video articulation can be increased by

enhancing the signal contour. If the built-in delay

line is not used, it can be turned off by using an

external resistor of minimum 200 k$ at pin 27.

To control the aperture amount, use a base clip.

Gamma Output

Aperture Signal

AMP2 Output

Output Circuit

A load of 75 $ can be driven directly. In addition,

the pedestal level can be controlled vertically.

CAUTIONS

• To control the aperture amount, apply base clip by

controlling pin 15.

• Avoid connecting or disconnecting an external resistor at

pin 27 to prevent the malfunction of the built-in delay line.

• Use the shortest possible distance to connect the bypass

capacitors between the power supply and GND pins. The

addition or removal of any external component should be

determined by how the existing components are mounted.

• This device is electronically sensitive. Handle only at

electrostatically safe work stations.

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