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Philips Semiconductors
I.F. amplifier and demodulator for
multistandard TV receivers
PARAMETER
A.F.C. output voltage swing
Change of frequency required for a.f.c.
output voltage swing of 10 V
A.F.C. switch off for a voltage lower than:
A.F.C. inverter switch
positive a.f.c. (Fig.2)
negative a.f.c. (Fig.3)
Tuner A.G.C.
Leakage current
Saturation voltage
I
= 0,3 mA
10
take-over point LOW
take-over point HIGH
Signal expansion at G
v
Negative modulation (Fig.4)
white spot inverter threshold level
white spot insertion level
noise inverter threshold level
noise insertion level
Positive modulation a.g.c. detector
reference level
Auxiliary video input signal for V
Auxiliary video output
output signal (note 2)
top sync level
output impedance
Levels for video switches
positive video
negative video
internally demodulated signal
auxiliary video signal
Notes to the characteristics
1.
Signal to
–
–
noise ratio S/N
2. Measured in application of Fig. 5.
April 1985
= 50 dB
= 2 V
o(p-p)
V
black-to-white
o
=
---------------------------------------------------------- -
V
at B
n rms
SYMBOL
V
10
15-3
f
V
17-3
V
0
16-3
V
4
16-3
I
10
V
10-3
V
i
V
10
i
V
22-3
V
22-3
V
22-3
V
22-3
V
22-3
V
3,0
11-3
V
0,7
12-3
V
14-3
V
1
14-3
|Z
|
14-3
V
2-3
V
3
2-3
V
23-3
V
3
23-3
=
5 MHz
5
Product specification
MIN.
TYP.
70
200
1,5
1,5
12
15
0,1
0,3
3
0,5
4,6
3,2
0,9
2,5
3,2
3,4
1
1,4
1
2
3
7
1
1
TDA2549
MAX.
UNIT
V
kHz
V
V
V
A
V
mV
mV
dB
V
V
V
V
V
V
V
V
V
V
V
V
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