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參數(shù)資料
| 型號(hào)： | TDA5634T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 調(diào)諧器 |
| 英文描述： | 9 V UHF mixer/oscillator for TV and VCR tuners |
| 中文描述： | 1-BAND, VIDEO TUNER, PDSO16 |
| 封裝： | 3.90 MM, PLASTIC, MS-012AC, SOT-109-1, SOP-16 |
| 文件頁(yè)數(shù)： | 8/20頁(yè) |
| 文件大?。?/td> | 116K |
| 代理商： | TDA5634T |
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1996 Nov 7
8
Philips Semiconductors
Product specification
9 V UHF mixer/oscillator for TV and VCR
tuners
TDA5634T
Fig.5 Cross modulation measurement in band C.
V
meas
= V
o
15.4 dB (transformer ratio N1/N2 = 5 and transformer loss).
Wanted output signal at f
RFW
: V
ow
= 108 dB
μ
V, V
meas
= 92.6 dB
μ
V.
Measuring the level of the unwanted output signal V
ou
causing 0.3 % AM modulation in the wanted output signal.
V
ou
= V
meas
+ 15.4 dB.
f
RFU
= f
RFW
+ 5.5 MHz; f
osc
= f
RF
+ 38.9 MHz.
Filter characteristics: f
c
= 38.9 MHz; f
3dBBW
= 1.2 MHz; f
30dBBW
= 2.64 MHz.
handbook, full pagewidth
source
e
w
50
50
wanted
signal
source
50
e
u
50
MBH050
D.U.T.
18 dB
attenuator
50
o
N1/N2 = 5
2 x 5
turns
2
turns
V
FILTER
38.9 MHz
modulation
analyzer
HYBRID
A
C
B
D
HYBRID
A
C
B
D
V
RMS
voltmeter
AM = 30%
1 kHz
IFOUT1
Vmeas
IFOUT2
CIN1
CIN2
Fig.6 N + 5
1 MHz pulling measurement in band C.
Loss of the hybrid: 1 dB.
In band C: f
RFW
= 781 MHz. These wanted signals are not used during the measurement.
In band C: f
osc
= 819.9 MHz.
In band C: f
RFU
= 820 MHz = f
RFW
+ 5
×
8 MHz
1 MHz.
Measuring the level of the unwanted signal V
iu
causing FM sidebands 30 dB below the oscillator carrier at the LO output.
V
iu
= V
meas
loss of the hybrid.
handbook, full pagewidth
MBH051
D.U.T.
LO1
LO2
Vi
unwanted
signal
source
V
Vmeas
HYBRID
A
C
B
D
HYBRID
A
C
B
D
eu
50
50
50
50
50
spectrum
analyzer
CIN1
CIN2
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