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參數資料
| 型號： | 935261948118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 調諧器 |
| 英文描述： | 2-BAND, VIDEO TUNER, PDSO24 |
| 封裝： | PLASTIC, SOT-137, SO-24 |
| 文件頁數： | 6/31頁 |
| 文件大小： | 328K |
| 代理商： | 935261948118 |
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1997 Feb 24
14
Philips Semiconductors
Product specication
5 V VHF, hyperband and UHF mixers/oscillators
for TV and VCR 3-band tuners
TDA5736; TDA5737
Fig.11 Cross modulation measurement in bands B and C.
V’meas =Vo 15.4 dB (transformer ratio N1/N2 = 5 and transformer loss).
Wanted output signal at fRFW = 170 or 450 MHz (450 or 860 MHz); Vow =70dBV.
We measure the level of the unwanted signal Vou causing 1% AM modulation in the wanted output signal;
fRFU = 165.5 or 445.5 MHz (445.5 or 855.5 MHz); fOSC = 203.9 or 483.9 MHz (483.9 or 893.9 MHz).
Vou =V’meas + 15.4 dB.
Filter characteristics: fc = 33.9 MHz, f3dBBW = 1 MHz; f30dBBW = 2.3 MHz.
handbook, full pagewidth
unwanted
signal
source
50
50
wanted
signal
source
50
50
MGE973
D.U.T.
RFB
(RFC)
RFB
(RFC)
IF
out
IF
out
18 dB
attenuator
50
o
N1/N2 = 5
2 x 5
turns
2
turns
V
FILTER
33.9 MHz
modulation
analyzer
HYBRID
AC
BD
HYBRID
AC
BD
V
RMS
voltmeter
VIMB
AM = 30%
(VIMC)
eu
ew
Fig.12 Input admittance (S11) of the band A mixer input (40 to 200 MHz); Yo = 20 mS.
handbook, full pagewidth
MBH055
0.2
2
1
0.5
10
5
0.2
2
1
0.5
10
5
∞
0
+ j
– j
0.2
0.5
1
2
5
10
40 MHz
200 MHz
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