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參數(shù)資料
| 型號： | TDA6500TT/C4,118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 調(diào)諧器 |
| 英文描述： | 3-BAND, VIDEO TUNER, PDSO32 |
| 封裝： | 6.10 MM, 0.65 MM PITCH, PLASTIC, MO-153, SOT487-1, TSSOP-32 |
| 文件頁數(shù)： | 21/37頁 |
| 文件大?。?/td> | 223K |
| 代理商： | TDA6500TT/C4,118 |
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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 = NFmeas loss of input circuit
PAL: IF = 38.9 MHz; L = 680 nH; C = 25.9 pF
Fig 10. Noise gure (NF) measurement in low band
Zi >> 50 → Vi =2 × Vmeas =Vmeas +6dB
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
Vi
50
50
50
V
LBIN
IFOUT
Vmeas
RMS
voltmeter
spectrum
analyzer
DUT
signal
source
C
L
e
Vo =Vmeas ×
=Vmeas + attenuation
Wanted output signal at fRFpix; Vo = 100 dBV.
Unwanted output signal at fRFpix + 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
Vo
DUT
A
B
C
D
HYBRID
C
L
eu
modulation
analyzer
unwanted
signal
source
ew
wanted
signal
source
AM = 30%
2 kHz
V Vmeas
18 dB
attenuator
FILTER
38.9 MHz
(PAL & OFDM)
50
50
50
2
L
2ω2
+
--------------------------------
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