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TDA5744 Datasheet(PDF) 9 Page - NXP Semiconductors

No. de pieza TDA5744
Descripción Electrónicos  Low power mixers/oscillators for hyperband tuners
Download  20 Pages
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA5744 Datasheet(HTML) 9 Page - NXP Semiconductors

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1998 Mar 09
9
Philips Semiconductors
Preliminary specification
Low power mixers/oscillators for
hyperband tuners
TDA5744; TDA5745
TEST AND APPLICATION INFORMATION
Fig.4 Voltage gain (GV) measurement in the VHF band.
(1) N1 is 2
× 5 turns.
(2) N2 is 2 turns.
The gain is defined as the transducer gain plus the voltage transformation ratio (Tloss) of the transformer.
Zi >> 50 Ω⇒ Vi =2 × Vmeas; Vi =80dBµV.
Vo =V’meas + 16 dB (transformer ratio
and transformer loss); GV =20log
N1
N2
--------
5
=
V
o
V
i
------
handbook, full pagewidth
50
50
V
e
Vmeas
RMS
voltmeter
spectrum
analyzer
Vi
signal
source
MGK828
D.U.T.
VHFIN
IFOUT1
IFOUT2
50
Vo
V'meas
C
T
(1)
N1
(2)
N2
Fig.5 Voltage gain (GV) measurement in the UHF band.
(1) N1 is 2
× 5 turns.
(2) N2 is 2 turns.
The gain is defined as the transducer gain plus the voltage transformation ratio (Tloss) of the transformer.
Vi =Vmeas; Vi =70dBµV.
Vo =V’meas + 16 dB (transformer ratio
and transformer loss); Gv = 20 log
+ 1 dB (1 dB = correction for hybrid loss).
N1
N2
--------
5
=
V
o
V
i
------
handbook, full pagewidth
Vi
50
50
V
e
Vmeas
RMS
voltmeter
signal
source
50
A
B
C
D
HYBRID
D.U.T.
UHFIN1
IFOUT1
IFOUT2
UHFIN2
spectrum
analyzer
MGK829
50
Vo
V'meas
C
T
(1)
N1
(2)
N2


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