參數(shù)資料
型號： TUA6045-2
廠商： INFINEON TECHNOLOGIES AG
元件分類： 調(diào)諧器
英文描述： 3-BAND, VIDEO TUNER, QCC48
封裝： VQFN-48
文件頁數(shù)： 55/64頁
文件大?。?/td> 890K
代理商： TUA6045-2
Data Sheet
59
Revision 3.1, 2006-12-19
TUA 6045-2
TAIFUN 3
Reference
5.6
Measurement Circuits
5.6.1
Gain (G
V) measurement in LOW band
Figure 9
Gain (G
V) measurement in LOW band
Z
i >> 50 => Vi = 2 x Vmeas = 80 dBV
V
i = Vmeas + 6dB = 80 dBV
V
0 = V’meas + 17 dB (transformer ratio N1:N2 and transformer loss)
G
v = 20 log(V0 / Vi)
5.6.2
Gain (G
V) measurement in MID and HIGH bands
Figure 10
Gain (G
V) measurement in MID and HIGH bands
V
i = Vmeas = 70 dBV
V
0 = V’meas + 17 dB (transformer ratio N1:N2 and transformer loss
G
v = 20 log(V0 / Vi) + 1 dB (1 dB = insertion loss of balun)
50
spectrum
analyser
Device
under
Test
SAWOUT
LOWIN
SAWOUT
V'
meas
V
0
V
i
50
C
Transformer
N1 : N2 = 10 : 2 turns
N1
N2
50
V
meas
RMS
Voltmeter
50
spectrum
analyser
Device
under
Test
SAWOUT
MIDIN
HIGHIN
SAWOUT
V'
meas
V
0
V
i
50
C
Transformer
N1 : N2 = 10 : 2 turns
N1
N2
50
V
meas
RMS
Voltmeter
Balun
1:1
MIDIN
HIGHIN
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