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Philips Semiconductors
Video modulator circuit
CHARACTERISTICS
V
= 5 V; T
= 25 C; measured in Fig.1; unless otherwise specified
P
amb
PARAMETER
Supply voltage range
Supply current consumption
Video input voltage
Input impedance
Voltage (d.c.) at video
input (clamp voltage)
Voltage (d.c.) at
sound input
Output voltage f = 50 MHz; R
Output voltage f = 600 MHz; R
Differential gain
Differential phase
Intermodulation
(1,1 MHz) (note 1)
Frequency shift
V
= 5%, f = 600 MHz
b
Frequency shift
V
= 5%, f = 800 MHz
b
Frequency drift
25 to 40 C
Frequency drift
15 to 55 C
Positive modulation
(see Fig.3)
Residual carrier voltage
Cross modulation (note 2)
Notes
1. Input signal:
d.c. 0,45 V (V
4,4 MHz; input voltage (p-p) = 0,6 V
5,5 MHz; input voltage (p-p) = 1,26 V
measured with respect to picture carrier, at f = 600 MHz.
2. Input signal:
d.c. 1 V (V
5,5 MHz AM modulated, f
m = 0,8; input voltage (p-p) = 2,27 V (including modulation)
measured with respect to the picture carrier, at f = 600 MHz.
March 1986
V
5-4
I
5
V
8(p-p)
R
8
V
8
V
1
= 75
V
L
6-7
= 75
V
L
6-7
G
f
f
f
f
V
r
= 1,85 V)
8-4
= 3,5 V)
8-4
= 100 kHz
m
SYMBOL
MIN.
4,5
30
4
Product specification
TDA6800
TDA6800T
TYP.
MAX.
5,5
9
13
1
1,4
2,5
13
10
10
10
80
60
100
tbf
100
300
2,5
0,1
0,25
UNIT
V
mA
V
k
V
V
mV
mV
%
deg.
dB
kHz
kHz
kHz
kHz
%
%
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