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| 型號： | TDA6501 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 5 V mixer/oscillator and synthesizer for PAL and NTSC standards |
| 中文描述： | 5 V型混合機/振蕩器和合成器PAL和NTSC制式標(biāo)準(zhǔn) |
| 文件頁數(shù)： | 28/37頁 |
| 文件大?。?/td> | 223K |
| 代理商： | TDA6501 |
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9397 750 15057
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 02 — 14 June 2005
28 of 37
Philips Semiconductors
TDA6500; TDA6501
5 V mixer/oscillator and synthesizer for PAL and NTSC standards
NF = NF
meas
loss of input circuit
PAL: IF = 38.9 MHz; L = 680 nH; C = 25.9 pF
Fig 10. Noise figure (NF) measurement in low band
Z
i
>> 50
→
V
i
= 2
×
V
meas
= V
meas
+ 6 dB
PAL: IF = 38.9 MHz; L = 680 nH; C = 25.9 pF
Fig 11. Maximum RF input level without lock-out in low band
fce214
LBIN
IFOUT
DUT
BNC
RIM
INPUT
CIRCUIT
C
L
NOISE
SOURCE
NOISE
FIGURE
METER
fce219
V
i
50
50
50
V
LBIN
IFOUT
V
meas
RMS
voltmeter
spectrum
analyzer
DUT
signal
source
C
L
e
V
o
= V
meas
×
= V
meas
+ attenuation
Wanted output signal at f
RFpix
; V
o
= 100 dB
μ
V.
Unwanted output signal at f
RFpix
+ 5.5 MHz.
The level of unwanted signal is measured by causing 0.09 % AM modulation in the wanted signal.
PAL: IF = 38.9 MHz; L = 680 nH; C = 25.9 pF and attenuation = 10.2 dB
Fig 12. Cross modulation measurement in low band
fce827
50
50
LBIN
IFOUT
RMS
voltmeter
V
o
DUT
A
B
C
D
HYBRID
C
L
e
u
modulation
analyzer
unwanted
signal
source
e
w
wanted
signal
source
AM = 30%
2 kHz
V V
meas
18 dB
attenuator
FILTER
38.9 MHz
(PAL & OFDM)
50
50
50
2
L
2
ω
2
+
-------------------------------
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