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U2270B-MFPY 데이터 시트보기 (PDF) - Atmel Corporation
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U2270B-MFPY
Read/Write Base Station
Atmel Corporation
U2270B-MFPY Datasheet PDF : 18 Pages
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4.2 Application 2
Basic application using diode feedback. This application allows higher communication distances
than .“Application
1”
Figure 4-2.
Application Circuit 2
BC639
4
×
1N4148
75 k
Ω
68 k
Ω
4.7 nF
+
22 µF
100 k
Ω
43 k
Ω
1.2 nF
1.35 mH 82
Ω
Antenna
1N4148
470 k
Ω
1.5 nF
C
IN
C
HP
V
S
V
EXT
DV
S
V
Batt
RF
MS
COIL2
CFE
U2270B
COIL1
Standby
Input
Output
HIPASS
OE
DGND GND
360
Ω
+
22 µF
+
22 µF
V
DD
12V
GND
Micro-
controller
I/O
V
SS
12
U2270B
4684E–RFID–02/08
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