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| 型號： | TDA6500 |
| 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)： | 27/37頁 |
| 文件大?。?/td> | 223K |
| 代理商： | TDA6500 |
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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
Z
i
>> 50
→
V
i
= 2
×
V
meas
= 80 dB
μ
V
V
i
= V
meas
+ 6 dB = 80 dB
μ
V
V
o
= V’
meas
×
= V’
meas
+ attenuation
G
v
= 20 log
PAL: IF = 38.9 MHz; L = 680 nH; C = 25.9 pF and attenuation = 10.2 dB
Fig 8.
Gain (G
V
) measurement in low band
a.
f
RF
= 50 MHz
b.
f
RF
= 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 figure in the low band
fce213
V
i
50
50
50
V
LBIN
IFOUT
V
meas
RMS
voltmeter
spectrum
analyzer
V
o
DUT
V'
meas
signal
source
C
L
e
50
2
L
2
ω
2
+
-------------------------------
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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| TDA6502 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V mixers/oscillators and synthesizers for cable TV and VCR 2-band tuners |
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