TDA5637 PHILIPS [NXP Semiconductors], TDA5637 Datasheet - Page 12

• Manufacturer Part Number: TDA5637
• Description: 9 V VHF, hyperband and UHF mixers- oscillators for TV and VCR 3-band tuners
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
1996 Jun 10
handbook, full pagewidth
handbook, full pagewidth
9 V VHF, hyperband and UHF mixers-
oscillators for TV and VCR 3-band tuners
Input circuit as shown in Fig.5.
NF = NF
Wanted output signal at f
We measure the level of the unwanted signal V
f
f
Filter characteristics: f
RFW
RFW
= 50 MHz, f
= 180 MHz, f
meas
loss
RFU
RFU
e
e
(input circuit)
w
u
= 55.5 MHz, f
c
= 185.5 MHz, f
50
50
= 38.9 MHz, f
SOURCE
RFW
NOISE
AM = 30%
unwanted
; V
dB.
wanted
source
source
signal
signal
ow
= 100 dB V.
OSC
OSC
3dBBW
= 88.9 MHz.
A
B
HYBRID
= 218.9 MHz.
Fig.7 Cross modulation measurement in band A.
= 1.2 MHz, f
BNC
Fig.6 Noise figure measurement in band A.
C
D
ou
CIRCUIT
INPUT
causing 0.3 % AM modulation in the wanted output signal; V
RIM
50
30dBBW
V IMN
= 2.64 MHz.
RFA
GND
AIN
D.U.T.
12
D.U.T.
IFOUT
IFOUT
V o
V' meas
27
voltmeter
RMS
V
27
attenuator
MBH467
9 dB
TDA5636; TDA5637
ou
38.9 MHz
modulation
FILTER
analyzer
= V’
METER
NOISE
meas
MBH468
50
------------------ -
50
Product specification
50
+
27
.