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PC1366 LINEAR INTEGRATED CIRCUIT
B/W TV VIF PROCESSING CIRCUIT
DESCRIPTION
Contek PC1366 is designed for B/W TV VIF processing
purpose. It includes VIF amplifier video low level detector RF
AGC, IF AGC and noise reduction circuit.
FEATURES
*High input sensitivity Typ.30dB m.
*Key and peak controllable AGC.
*Operating voltage down to 7V.
*Wide video bandwidth suitable for modulation IF of 4.5,
5.5,6.0,6.5 MHZ.
*Differential input implied with easy used with SAW
*Low external part count.
BLOCK DIAGRAM
DIP-14H
Contek
Rf
RF AGC
to tuner
6 4 2 12 7
5
RF
AGC
IF amplifier
saw filter
Video IF
input
AGC
time
constant
Cap
IF
AGC
Key
control
pulse input
IF power
Noise
reduction
Low level
detector
Detector
coil
Vcc
Video
output
GND
Video
3
output
131 1410 118 9
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
1
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PC1366 LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUN RATING(Ta=25 C)
PARAMETER SYMBOL VALUE UNIT
Supply Voltage VCC 15 V
Output Current IP-P 3 VP-P
Power Dissipation PD 875(Ta=75 C)With heat sink W
Operating Temperature TOPR -20 ~ +70 C
Storage Temperature TSTG -40 ~ +125 C
ELECTRICAL CHARACTERISTICS(Ta=25 C,VCC=12V,fP=38MHZ,fm=400HZ)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Total Supply Current ICC I7+I12,RA=150W 40 50 60 mA
Input Sensitivity SVI Modulation=80%,
VO=1.4VP-P
Max Input Voltage VI(MAX) Modulation=80%,-1dB 100 dBm
Video Output Voltage VO Modulation=80%,VI=3mVrms 1.0 1.4 1.7 VP-P
Video Output DC Voltage VO(DC) No signal 3.3 3.8 4.3 V
S/N Ratio S/N Modulation=80%-0%,
VI=3mVrms
RF AGC Voltage(Hi) V6H V5=0V 8 9 11 V
RF AGC Voltage(Lo) V6L V5=7V 0 0.5 V
Differential Gain D.G. Step signal,fM=4.43MHZ 10 %
Differential Phase D.P. Step signal,fM=4.43MHZ 10 deg
Video Detector Bandwidth GV(F) -3dB point 5.5 MHZ
Input Impedance RIN 1.5 KW
Input Capacitance CIN 3.3 pF
40 50 dB
30 35 dB m
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
2
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PC1366 LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
Audio IF
output
Video
output
RF AGC voltage
( to tuner )
+B 12V
56W
12pF
0.22 mF
220
0.01
20kW
20kW
0.01
mF
mF
820W
W
7 6 5 4 3 2 1
180W
6.8kW
Input
1.5kW
120W
TEST CIRCUIT
V A
A 47 mF
B
0.01 mF
5 6 4 2 12 7 3
saw
filter
222 mF
0.22 mF
W
470k
RF
AGC
222 mF
IF amplifier Video Amplifier
IF
AGC
Noise
reduction
Low level detector
W
680
22pF
Detector
coil
8 9 10 11 12 13 14
F
m
0.01 mF
0.01
222 mF
150W
AGC
10k W
0.01 mF
AB
1k W
6.8kW
0.01 mF
47 mF
0.01 mF
SW3
AB
150 W
47 mF
Note(Pin 2 GND to have peak AGC)
Vcc 12V
IDS
100 W
1k W
0.01 mF
M
Video
output
Contek PC1366
CONTEK
8 9 11 1 14 1310
F
m
0.01 mF
0.01
38MHz
F
m
0.01
F
m
0.01
600 W
Detector
coil
22pF
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
3
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PC1366 LINEAR INTEGRATED CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
Input sensitivity curve
80
70
60
50
40
30
Input sensitivity i(sense)(dBu)
20
10
0
0 5 10 15 20
10
20
30
S/N ratio(dB)
40
50
60
0 2040 60 80100
fp=38MHz,fm=400MHz
MOD=80%,Ra=150W
Power supply
voltage(Vcc)
S/N vs input voltage
fp=38MHz,fm=400MHz
MOD=80%-0%,
Vi=3mVrms, Ra=150W
Input voltage
Vi(dBu)
0
-5
-10
Video detector output attenuation ATT (dB)
-15
0.01
2.0
1.6
1.2
voltage(Vp-p)
0.8
Video detector output
0.4
0
04
Video detector output attenuation vs
fp=38MHz,fm=400MHz
MOD=80%,Ra=150W
frequency
fp=38MHz
MOD=40%
Vi=3mVrms
0.1 1.0
Video detector output vs
power supply voltage
812
10.0 100.0
Frequency
(MHz)
16
Power supply voltage Vcc(V)
20
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
4
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