參數(shù)資料
型號: 935260937112
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PDSO28
封裝: PLASTIC, SOT-341, SSOP-28
文件頁數(shù): 8/37頁
文件大?。?/td> 296K
代理商: 935260937112
1999 Jan 13
16
Philips Semiconductors
Product specication
5 V mixer/oscillator-PLL synthesizers for
hyperband tuners
TDA6404; TDA6405;
TDA6405A
Fig.6 Cross modulation measurement in the VHF band.
(1) N1 is 2
× 5 turns
(2) N2 is 2 turns
Zi >> 50 Vi =2 × Vmeas; V’meas =Vo 16 dB (transformer ratio
and transformer loss)
Wanted input signal Vi =80dBV at wanted fRF = 45.25 MHz (399.25 MHz).
Measured level of the unwanted output signal Vou causing 0,3% AM modulation in the wanted output signal;
unwanted fRF = 50.75 MHz (404.75 MHz); Vou =V’meas +16dB.
N1
N2
--------
5
=
handbook, full pagewidth
unwanted
signal
source
eu
ew
50
50
wanted
signal
source
50
MGL275
D.U.T.
18 dB
attenuator
50
o
V
FILTER
38.9 MHz
modulation
analyzer
HYBRID
AC
BD
V
RMS
voltmeter
Vi
AM = 30%
meas
V'
VHFIN
IFOUT1
IFOUT2
C
T
50
V
Vmeas
RMS
voltmeter
(1)
N1
(2)
N2
Fig.7 Cross modulation measurement in the UHF band.
(1) N1 is 2
× 5 turns
(2) N2 is 2 turns
Vi =Vmeas; V’meas =Vo 16 dB (transformer ratio
and transformer loss)
Wanted input signal Vi =70dBV at fRF = 407.25 MHz (855.25 MHz).
Measured level of the unwanted output signal Vou causing 0,3% AM modulation in the wanted output signal;
unwanted fRF = 412.75 MHz (860.75 MHz); Vou =V’meas +16dB.
N1
N2
--------
5
=
handbook, full pagewidth
unwanted
signal
source
50
50
wanted
signal
source
50
50
MGL276
D.U.T.
18 dB
attenuator
50
o
V
FILTER
38.9 MHz
modulation
analyzer
HYBRID
AC
BD
HYBRID
AC
BD
V
RMS
voltmeter
Vi
AM = 30%
eu
ew
(1)
N1
(2)
N2
UHFIN1 IFOUT1
IFOUT2
UHFIN2
C
T
50
V
Vmeas
RMS
voltmeter
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