TDA5636BT PHILIPS [NXP Semiconductors], TDA5636BT Datasheet - Page 12

• Manufacturer Part Number: TDA5636BT
• Description: 9 V VHF hyperband and UHF mixer/oscillator for TV and VCR 3-band tuners
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
1996 Dec 02
handbook, full pagewidth
handbook, full pagewidth
9 V VHF hyperband and UHF mixer/oscillator for
TV and VCR 3-band tuners
(1) NF = NF
V’
Wanted output signal at f
We measure the level of the unwanted signal V
V
The cross modulation measurements are done at these frequencies:
- f
- f
Filter characteristics: f
ou
meas
RFW
RFW
= V’
= 50.0 MHz; f
= 180.0 MHz; f
= V
meas
e
e
o
w
u
meas
50
50
50
------------------ -
50
------------------ -
50
+
50
AM = 30%
loss (input circuit) dB.
unwanted
+
RFU
27
wanted
source
RFU
source
27
signal
signal
c
= 38.9 MHz, f
= 55.5 MHz; f
SOURCE
RFW
= 185.5 MHz; f
NOISE
+ 15.4 dB.
15.4 dB (transformer ratio
= 180 MHz: V
A
B
HYBRID
osc
3dBBW
C
D
osc
= 88.9 MHz
Fig.7 Cross modulation measurement in band A.
ow
= 218.9 MHz.
= 1.2 MHz, f
BNC
Fig.6 Noise figure measurement in band A.
=104 dB V.
(see Fig. 5)
ou
50
CIRCUIT
INPUT
V IMA
causing 0.3% AM modulation in the wanted output signal; f
N1
------- -
N2
RIM
30dBBW
RFA
= 5 and transformer loss).
D.U.T.
= 2.64 MHz.
GND
AIN
out
out
IF
IF
12
D.U.T.
IFOUT1
IFOUT2
V
o
2 x 5
turns
N1/N2 = 5
N1/N2 = 5
2
turns
turns
2 x 5
27
MBH046
voltmeter
RMS
TR
TDA5636B; TDA5637B
V
attenuator
18 dB
V'
2
turns
RFU
meas
= 185.5 MHz.
METER
38.9 MHz
NOISE
FILTER
Product specification
modulation
analyzer
50
MGC508