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參數(shù)資料
| 型號： | MC2800 |
| 廠商： | Motorola, Inc. |
| 英文描述： | FSK FM IF Receiver(FSK FM IF 接收器) |
| 中文描述： | FSK信號調(diào)頻（FSK信號調(diào)頻中頻接收器中頻接收機） |
| 文件頁數(shù)： | 24/28頁 |
| 文件大小： | 473K |
| 代理商： | MC2800 |
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MC2800
24
MOTOROLA RF/IF DEVICE DATA
Data Slicer A/D Conversion
In the data slicer of the MC2800 there is a block of
comparators which can compare four different kinds of input
voltage levels. This “4 level” comparator compares the
incoming signal (BRF Out) and then turns it into digital D1
and D2 outputs. This is shown graphically in Figure 21. The
state table of D1 and D2 is shown in Table 5.
Table 5. State Table of D1 and D2
Frequency Deviation
D1
D2
4.8 kHz
0
0
1.6 kHz
0
1
–1.6 kHz
1
1
–4.8 kHz
1
0
4.8 kHz
–1.6 kHz
BRF Out
D1
D2
1.6 kHz
–4.8 kHz
Figure 21. D1 and D2 Outputs
MC2800 with HP8648
–
+
+
–
+
MC2800 Demo Board PCB
(See Figure 23)
Figure 22. MC2800 Demo Board Test Circuit
(See Figures 5 and 10 for component list)
Ampermeter
Power Supply
Signal Generator
Output
+MCU
(See Table 6)
HP34401A
HP6205C
HP8648
MC68175
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