參數(shù)資料
型號(hào)： TDA5737ATS
廠商： NXP SEMICONDUCTORS
元件分類： 調(diào)諧器
英文描述： 3-BAND, VIDEO TUNER, PDSO24
封裝： 5.30 MM, PLASTIC, MO-150, SOT-340-1, SSOP-24
文件頁數(shù)： 5/28頁
文件大小： 180K
代理商： TDA5737ATS
2000 Dec 19
13
Philips Semiconductors
Preliminary specication
5 V VHF, hyperband and UHF
mixers/oscillators for TV and VCR 3-band tuners
TDA5737A
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.10 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
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
Fig.11 Input admittance (s11) of the band A mixer input (40 to 200 MHz); Yo =20mS.
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