參數(shù)資料
型號(hào): TDA4455
英文描述: Schottky Rectifier; Forward Voltage:0.45V; Forward Current:2A; Repetitive Reverse Voltage Max, Vrrm:20V; Package/Case:DO-220AA; Peak Surge Current:50A
中文描述: 多標(biāo)準(zhǔn)資料表格放大器和鎖相環(huán)解調(diào)器
文件頁數(shù): 2/12頁
文件大小: 158K
代理商: TDA4455
TELEFUNKEN Semiconductors
TDA4455
Preliminary Information
Rev. A1: 08.05.1995
2 (12)
Block Diagram
90
°
0
°
Interference
rejection
Video
VCO
R
O
Video
output
7
Lock
detector
B/G
L
D2MAC
V
S
15
B/G
D2MAC
L
3
6
IF AGC
5
8
14
Average
(only L, D2MAC)
13
12
10
9
16
Loop filter
VCO Tank
11 Standard switch
Input
selector
switch
=
+
17
18
1
2
IF Input 1
4
Tuner AGC
93 7502
Tuner AGC
take over
Int. Ref
IF Input 2
Overload
detector
+/–
Pin Description
Pin
1, 2
3
Symbol
Function
IF input 1
Tuner AGC adjustment (turn
over point)
Delayed tuner AGC current
Ground
IF AGC time constant
Video output
Video averaging for standard L
and D2MAC
4
5, 14
6
7
8
Pin
9, 10
11
12
13
15
16
17, 18
Symbol
Function
VCO circuit
Standard switch
PLL loop filter
PLL time constant switch
Supply voltage
Input selector switch
IF input 2
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