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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 20/37頁(yè) |
| 文件大小： | 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
27 of 37
Philips Semiconductors
TDA6500; TDA6501
5 V mixer/oscillator and synthesizer for PAL and NTSC standards
13.2 Test circuit for low band measurements
Zi >> 50 → Vi =2 × Vmeas =80dBV
Vi =Vmeas +6dB=80dBV
Vo =V’meas ×
=V’meas + attenuation
Gv = 20 log
PAL: IF = 38.9 MHz; L = 680 nH; C = 25.9 pF and attenuation = 10.2 dB
Fig 8.
Gain (GV) measurement in low band
a. fRF =50MHz
b. fRF = 150 MHz
Low band mixer frequency response
measured = 57 MHz; loss = 0 dB;
image suppression = 16 dB.
C1 = 9 pF.
C2 = 15 pF.
L1 = 7 turns (
5.5 mm,
wire
= 0.5 mm).
l1 = semi rigid cable (RIM): 5 cm long;
33 dB/100 m; 50
; 96 pF/m
Low band mixer frequency response
measured = 150.3 MHz;
loss = 1.3 dB;
image suppression = 13 dB.
C3 = 5 pF.
C4 = 25 pF.
l2 = semi rigid cable (RIM): 30 cm
long; 33 dB/100 m; 50
96 pF/m.
l3 = semi rigid cable (RIM): 5 cm long;
33 dB/100 m; 50
96 pF/m.
Fig 9.
Input circuit for optimum noise gure in the low band
fce213
Vi
50
50
50
V
LBIN
IFOUT
Vmeas
RMS
voltmeter
spectrum
analyzer
Vo
DUT
V'meas
signal
source
C
L
e
50
2
L
2ω2
+
--------------------------------
V
o
V
i
------
001aad065
L1
C2
C1
PCB
plug
BNC
RIM-RIM
I1
mbe286
plug
BNC
C4
C3
PCB
RIM-RIM
I3
I2
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