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參數(shù)資料
| 型號： | U4224B-CFLG3 |
| 英文描述： | Time Code Receiver |
| 中文描述： | 時間碼接收機 |
| 文件頁數(shù)： | 2/17頁 |
| 文件大?。?/td> | 225K |
| 代理商： | U4224B-CFLG3 |
U4224B
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
2 (17)
Pin Description
Pin
Symbol
Function
SO 16 L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
CC
IN
GND
SB
Q1A
Q1B
REC
INT
DEC
FLA
FLB
SL
Q2A
Q2B
PON
TCO
Supply voltage
Amplifier – Input
Ground
Bandwidth control
Crystal filter 1
Crystal filter 1
Rectifier output
Integrator output
Decoder input
Low pass filter
Low pass filter
AGC hold mode
Crystal filter 2
Crystal filter 2
Power ON/OFF control
Time code output
3
4
5
2
1
6
7
8
V
CC
IN
GND
SB
TCO
PON
15
14
16
13
12
11
10
9
DEC
93 7729 e
U4224B
Q1A
Q1B
REC
INT
Q2B
Q2A
SL
FLB
FLA
IN
A ferrite antenna is connected between IN and V
CC
. For
high sensitivity the Q of the antenna circuit should be as
high as possible, but a high Q often requires temperature
compensation of the resonant frequency. Specifications
are valid for Q > 30. An optimal signal to noise ratio will
be achieved by a resonant resistance of 50 to 200 k .
IN
V
CC
94 8379
SB
A resistor R
SB
is connected between SB and GND. It con-
trols the bandwidth of the crystal filters. It is
recommended: R
SB
= 0
for DCF 77.5 kHz, R
SB
=
10 k for 60 kHz WWVB and R
SB
= open for JG2AS
40 kHz.
SB
GND
94 8381
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