U4222B Datasheet, PDF (6/9 Pages) TEMIC Semiconductors – Radio Controlled Clock Receiver

U4222B
TELEFUNKEN Semiconductors
Test Circuit for JG2AS
Measurement point
40 kHz
Generator ₅₀
(with variable
output level)
Electronic switch
(Time Code)
100 n
100 W
1
50
2
50 k
3
330 nF
4
5
47 nF
6
U4222B
7
40 kHz
8
+V_CC
16
15
14
13
12
11
10
9
It must be noted:
Input is shortened by 50 W, that
means, the antenna noise is not taken
into consideration.
PON
TCO
Measuring device:
w V_CCD–0.8
V
w ^{Oscilloscope with high impedance}
probe ^{( 20 MW)}
T
T = 500 ms (binary “0”)
1s
or 800 ms (binary “1”)
Receiver input signal calibration:
Example: 2 m V_eff input signal ⇒ 2
2
2
10³ = 5.65 mV_pp at measurement point
Figure 5.
93 7720 e
Application Circuit for JG2AS 40 kHz
+V _CC
CONTROL LINES
Ferrite Antenna
330 nF
47 nF
40 kHz
6 (9)
1
2
3
4
U4222B
5
6
7
8
16
15
PON
14
TCO
13
12
11
10
9
Figure 6.
MICROCOMPUTER
KEYBOARD
DISPLAY
94 8030 e
Preliminary Information
Rev. A1: 07.08.1995