TDA5736 Datasheet, PDF (12/28 Pages) NXP Semiconductors – 5 V VHF, hyperband and UHF mixers/oscillators for TV and VCR 3-band tuners

Philips Semiconductors
5 V VHF, hyperband and UHF mixers/oscillators
for TV and VCR 3-band tuners
Product specification
TDA5736; TDA5737
handbook, full pagewidth ^unwanted
signal
50 Ω source
AC
AM = 30%
eu
HYBRID
50 Ω
BD
wanted
ew
signal
source
RFA
IF
out
VIMA
50
Ω
D.U.T.
IF
out
Vo
2x5
turns
FILTER
18 dB
attenuator
33.9 MHz
2
V ^V'meas
turns
N1/N2 = 5 RMS
voltmeter
modulation
analyzer
50 Ω
MGE972
V’_meas = V_o − 15.4 dB (transformer ratio N1/N2 = 5 and transformer loss).
Wanted output signal at f_RFW = 50 MHz (170 MHz); V_ow = 80 dBµV.
We measure the level of the unwanted signal V_ou causing 1% AM modulation in the wanted output signal; f_RFU = 45.5 MHz (165.5 MHz);
f_osc = 83.9 MHz (203.9 MHz).
V_ou = V’_meas + 15.4 dB.
Filter characteristics: f_c = 33.9 MHz, f_−3dBBW = 1 MHz; f_−30dBBW = 2.3 MHz.
Fig.7 Cross modulation measurement in band A.
handbook, full pagewidth DC supply
VP
6.8 kΩ
100 µF
100 µF
ripple
signal
47 Ω
REFERENCE
MEASUREMENT
SET-UP
OF FIG. 17
WITHOUT
L10, C25, C35, C26
to
spectrum
analyser
53.5 dBc
−500 kHz ^fo
+500 kHz MGE974
The ripple susceptibility is defined as the level of a signal added to the supply voltage causing sidebands in the LO output at 53.5 dBc.
This signal has a frequency between 20 Hz and 500 kHz.
Fig.8 Ripple susceptibility.
1997 Feb 24
12