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參數(shù)資料
| 型號(hào)： | LM1872 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Radio Control Receiver/Decoder |
| 中文描述： | 遙控接收器/解碼器 |
| 文件頁數(shù)： | 11/19頁 |
| 文件大?。?/td> | 371K |
| 代理商： | LM1872 |
Applications
(Continued)
TL/H/7912–15
R1
D
Motor decoupling
R2
D
Sync timer; R2
e
SYNC
t’
s
470k
R3
D
Mixer decoupling
C1
D
LO bypass; optional
C2
D
LO tank; C2
e
22 pF
@
72 MHz
Ant. input tank; C3
e
24 pF
@
72 MHz
C3
D
C4
D
V
BIAS
bypass
Motor decoupling
C5
D
C6
D
Sync timer; C6
e
SYNC
t’
s
0.5
m
F
C7
D
Mixer decouple; 0.01
m
F
s
C7
s
0.1
m
F
C8
D
AGC
C9
D
IF bypass; optional
V
a
bypass; 0.01
m
F
s
C10
s
0.1
m
F
C10
D
C12 D
Ant. input tank; C12
e
160 pF
@
72 MHz
L1
D
LO Coil
Toko 10k type (KENC) 4T; 0.2
m
H
@
72 MHz
L1 could be made a fixed coil, if desired
T1
D
455 kHz mixer transformer
Toko 10 EZC type (RMC-502182), Qu
e
110
Pin 1–2, 82T; pin 2–3, 82T
Pin 1–3, 164T; pin 4–6, 30T
T2
D
455 kHz IF transformer
Toko 10 EZC type (RMC-502503), Qu
e
110
Pin 1–2, 82T; pin 2–3, 82T
Pin 1–3, 164T; pin 4–6, 8T
T3
D
Ant. input transformer
Toko 10k type (KENC), 4T sec &
2T pri. of 0.2
m
H
@
72 MHz
X1
D
5th overtone crystal, parallel-mode, 72 MHz
D1
D
Electrostatic discharge (ESD) protection
FIGURE 8. 72 MHz Receiver Circuit
In a practical remote data link, the transmitter could be bat-
tery operated and set up to transmit for brief intervals only in
order to save power. The brief transmission could be used
to set or reset the digital output latches in the LM1872 and/
or command new motor positions via the analog channels.
After transmission, the commands would be stored electri-
cally in the case of the digital channels and mechanically in
the case of the analog channels.
As a final note, if the case of D1 is connected to the anode
rather than the cathode, the circuit of Figure 9b should be
used at the input to maintain electromagnetic shielding.
11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1872N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Radio Control Receiver/Decoder |
| LM1872N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Remote-Control Receiver/Decoder |
| LM1872N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Remote-Control Receiver/Decoder |
| LM1875 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:20W AUDIO POWER AMPLIFIER |
| LM1875_05 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:20W AUDIO POWER AMPLIFIER |
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