參數(shù)資料
型號: LA7265W
廠商: Sanyo Electric Co.,Ltd.
英文描述: Single-Chip Black and White CCD Camera Signal Processing IC(單片黑白CCD照相機信號處理芯片)
中文描述: 單芯片黑白CCD攝像機信號處理集成電路(單片黑白防治荒漠化公約照相機信號處理芯片)
文件頁數(shù): 11/24頁
文件大?。?/td> 355K
代理商: LA7265W
Continued from preceding page.
Unit (resistance:
), I: input, O: output, B: I/O, P: power supply
Function
No. 4850-11/24
LA7265W
Pin No.
Symbol
I/O
Equivalent circuit
7
8
9
10
11
AGC. GAIN
AGC. CONT
DETECT. IN
DETECT. OUT
AGC. REF
I
O
I
O
I
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.
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.
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.
Continued on next page.
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