tda5745ts NXP Semiconductors, tda5745ts Datasheet - Page 9

• Manufacturer Part Number: tda5745ts
• Description: Low Power Mixers/oscillators For Hyperband Tuners
• Manufacturer: NXP Semiconductors

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