參數(shù)資料
型號(hào): HMP8117
廠商: Intersil Corporation
英文描述: NTSC/PAL Video Decoder
中文描述: NTSC / PAL視頻解碼器
文件頁(yè)數(shù): 3/45頁(yè)
文件大?。?/td> 269K
代理商: HMP8117
3
H
Analog Front End Block Diagram
LCAP
M
U
X
1.0
μ
F
VID1
VID2
Y_IN
1.0
μ
F
1.0
μ
F
CLAMP
CLAMP
75
7
6
5
CVBS2
CVBS1
CVBS3(Y)
1.75V
REF
2X
76
0.1
μ
F
100
μ
A
100
μ
A
CHARGE PUMP
9
EXTERNAL
ANTI-ALIAS
FILTER
8
10-BIT
ADC
10
SYNC-TIP ENABLE
DIGITAL
ANTI-
ALIAS
FILTER
13-STEP
VARIABLE
ATTENUATOR
8
Y
OUT
Y[7:0]
Y
IN
LOW-PASS
FILTER
(REMOVE Fsc)
GAIN
CORRECTION
LOGIC
BACKPORCH
ENABLE
GAIN CONTROL
SET POINT
FINE ADJUST MULT. FACTOR
C
M
DISABLE
11
4
STORAGE
CAP
BUF
CHROMA
ATTEN
(BELOW)
CHROMA
ATTEN
CCAP
2X
29
C_IN
1.0
μ
F
C
19
75
EXTERNAL
ANTI-ALIAS
FILTER
17
10
A/D_TEST
BUF
DISCHARGE
CHARGE
100
μ
A
100
μ
A
CHARGE PUMP
DISCHARGE
CHARGE
BIAS/
INTERNAL
REFERENCE
0.1
μ
F
STORAGE
CAP
1.0
μ
F
78
28
RSET
REF_CAP
1
C[7:0]
#
DECODER PIN #
MUX
SELECT
DIGITAL
ANTI-
ALIAS
FILTER
DISABLE
LUMA
DC-RESTORE
LOGIC
CHROMA
DC-RESTORE
LOGIC
CHROMA MULT.
(BELOW)
CHROMA
MULT.
(OFFSET LUMA SIGNAL TO LOWER ADC REF ~= 1.5V)
(OFFSET CHROMA SIGNAL TO ADC MID-SCALE ~= 2.0V)
C
M
7
NOMINAL (NTSC) OPERATING CONDITION
6
5
CVBSX. SIZE = INPUT. SYNC TIP CLAMPED AT ~= 1.75 VDC.
8
Y
OUT
/Y
IN
. SIZE = ~1.0 V
P-P
, SYNC TIP OFFSET ~= 1.5 VDC.
PIN #
19
C. SIZE = INPUT SIZE. PORCH OFFSET ~= 2.0 VDC.
17
A/D_TEST. SIZE ~= F(LUMA AGC), PORCH OFFSET ~= 2.0VDC.
9
CHROMA INPUT
76
NOMINAL (NTSC) OPERATING CONDITION
LCAP. DC-SIGNAL OFFSET ~= 2.4 VDC.
29
CCAP. DC-SIGNAL OFFSET ~= 2.4 VDC.
PIN #
28
RSET. DC-SIGNAL OFFSET ~= 1.2 VDC.
78
REF_CAP. DC-SIGNAL OFFSET ~= 2.5 VDC.
2.5V
1.5V
10-BIT
ADC
2.5V
1.5V
SYNC-TIP ENABLE
T
8
T
1.75V
(SIGNAL BIAS ~ 2.0V)
4 TO 13
DECODER
13
POWERDOWN
75
75
13-STEP
VARIABLE
ATTENUATOR
1.75V
TO
MUX
50
μ
A
CLAMP
2.0V
1.0
μ
F
75
#
PIN
VAA
INPUT
VIDEO
nmos
(INTERNAL CLAMP)
(EXTERNAL)
+
-
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