LA7265W(1998) Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LA7265W
(Rev.:1998)

Single-Chip Black and White CCD Camera Signal Processing IC

SANYO -> Panasonic 

Continued from preceding page.

Pin No. Symbol

I/O

7

AGC. GAIN

I

LA7265W

Equivalent circuit

Unit (resistance: Ω), I: input, O: output, B: I/O, P: power supply

Function

AGC control signal input. The signal that was clamped by the post-

CDS OPB is split into two paths. The first path goes to the AGC

amplifier system. This pin is provided to adjust the AGC gain

according to the brightness, and it uses the smoothed AGC control

voltage output from pin 8. The AGC minimum gain is about –2 dB.

See the description of pin 39 for the second path from this pin.

8

AGC. CONT O

AGC control signal output. This output is smoothed by an RC circuit

and then input to pin 7. The range over which the AGC control

voltage varies is about 1 to 3 V.

9

DETECT. IN

I

10 DETECT. OUT O

11

AGC. REF

I

AGC detector circuit input. The pin 10 output is resistor divided,

smoothed and input to this pin.

AGC detector circuit output. A signal that has had pedestal added

and has been white clipped (see the pin 35 description) is amplified

by the AGC detector amplifier and output from this pin. An emitter

open circuit is used for this output. This output must be resistor

divided and smoothed by a capacitor.

AGC control amplifier reference input. The voltage input to pin 9 goes

to the AGC control amplifier. The state of this pin adjusts the AGC

control voltage. (This pin is normally left open.) If the image is too

bright, lower the AGC amplifier gain sensitivity by lowering this pin

(AGC.REF) to lower the AGC control voltage. If the image is too

dark, increase the AGC amplifier gain sensitivity by raising this pin

(AGC.REF) to increase the AGC control voltage.

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