參數(shù)資料
型號(hào)： PNX3000
廠商： NXP Semiconductors N.V.
英文描述： Analog front end for digital video processors
中文描述： 模擬前端數(shù)字視頻處理器
文件頁(yè)數(shù)： 29/51頁(yè)
文件大?。?/td> 285K
代理商： PNX3000
2004 Oct 04
29
Philips Semiconductors
Preliminary specification
Analog front end for digital video
processors
PNX3000
2nd sound IFAGC circuit
2
ND
S
OUND
IF
EXTERNAL INPUT
V
i(rms)
input voltage range (RMS
value)
input frequency range
input resistance
input capacitance
18
320
mV
f
i
R
i
C
i
2
ND
S
OUND
IF AGC
G
I
ch(AGC)
note 21
note 3
note 3
4
25
3
10.7
MHz
k
pF
gain control range
charge current AGC pin
25
1
12.5
2.5
50
2.5
dB
μ
A
μ
A
μ
A
μ
A
mA
FM mode
AM mode
FM mode
AM mode
overload
I
dch(AGC)
discharge current AGC pin
D
IGITAL OUTPUT
n
d(p-p)
decimal digital output level
(peak-to-peak value)
FM mode
AM mode; no modulation
716
358
Sound trap and group delay correction filter
S
OUND TRAP
B
v(
3dB)
3 dB video bandwidth
(sound trap + group delay)
f
SC1
= 4.5 MHz
f
SC1
= 5.5 MHz
f
SC1
= 6.0 MHz
f
SC1
= 6.5 MHz
3.90
4.80
5.25
5.70
4.00
4.90
5.35
5.80
1.0
2.0
MHz
MHz
MHz
MHz
dB
V
chrom(p)
peaking at chroma
subcarrier frequency
attenuation at first sound
carrier f
SC1
attenuation at second
sound carrier f
SC2
α
SC1
all trap frequencies
28
33
dB
α
SC2
f = 4.726 MHz; f
SC1
= 4.5 MHz
f = 5.742 MHz; f
SC1
= 5.5 MHz
f = 6.55 MHz; f
SC1
= 6.0 MHz
f = 6.742 MHz; f
SC1
= 6.5 MHz
21
21
12
18
27
27
18
24
dB
dB
dB
dB
G
ROUP DELAY CORRECTION
;
FIGURES
6
AND
7;
NOTE
22
t
d(g)
group delay
f = 4.43 MHz; sound trap
frequency 5.5 MHz; sound trap
only
f = 4.43 MHz; sound trap
frequency 5.5 MHz; sound trap
plus group delay correction
filter
180
ns
170
ns
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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