U4311B Datasheet, PDF (10/14 Pages) TEMIC Semiconductors – Low-current Superhet Remote Control Receiver

U4311B
TELEFUNKEN Semiconductors
V_S
W 8.2 k R₁
C₇
10 mF
C₈
56 W R₉
100 nF
C₉
10 mF
C₁₀
10 nF
W ^{IF input}
300
R₁₀
R₈
100 kW
16
15
14
13
12
11
10
C₁₁
10 nF
Wake up
9
out
C₂
100 nF
Data filter
output
C₁
10 nF
C₃
1.5 nF
100 kW
1
2
3
4
5
6
7
8
30 kW R2
R₆
W 100 k
R₅
C₄
100 nF
R₇ ^{Wake up}
22 kW
R₃
220 kW
C₅
220 nF
R₁₂
C₁₂
W 100 k 220 nF
Comparator
output
100 kW
R₁₃
R₄
10 kW
C₆
220 nF
R₁₁
10 kW
Figure 23. AM test circuit with 2 kHz Bessel low pass data filter
10
0
–10
–20
–30
–40
–50
–60
–70
–80
0
95 10292
S+N
N (low level)
N (high level)
20
40
60
80 100
m IF-input level ( d BV )
Figure 24. Signal to noise ratio AM
100
90
+25°C
80
+85°C
70
60
50
–40°C
40
30
20
10
10 25 40 55 70 85 100
95 10276
m IF-input level (dB V )
Figure 25. AM-demodulator characteristic vs. temperature
10 (14)
Rev. A1: 23.06.1995