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參數(shù)資料
| 型號： | U2510B |
| 廠商： | ATMEL CORP |
| 元件分類： | 接收器 |
| 英文描述： | All-Band AM/FM Receiver and Audio Amplifier |
| 中文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP28 |
| 封裝： | SDIP-28 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大?。?/td> | 262K |
| 代理商： | U2510B |
U2510B
Rev. A3, 23-Feb-01
11 (15)
The alignment of the LC-discriminator circuit should be
done with little or no effect on the AFC function. This can
be realized by:
–
switching Pin 21 to open-circuit
–
connecting Pin 1 to a voltage source of 2 V
–
using a low signal level for alignment.
In general, ceramic discriminator devices can be used,
too. In this case, the effect of unavoidable spreads in the
frequency characteristics of these case ceramic devices in
conjunction with the IC characteristic has to be consid-
ered. For example, mismatches of the characteristics
between selectivity block and FM discriminator will lead
to an increased signal-to-noise ratio at low signal level as
well as to a higher demodulation distortion level or to an
asymmetrical AFC.
Application Circuits
14
15
16
17
18
U2510B
19
20
21
22
13
12
11
10
9
8
7
23
24
25
26
27
28
6
5
4
3
2
1
4.7
μ
F
18 pF
C
24
C
8
T
4
T
2
27 pF
C
4
L
2
22 pF
C
3
L
1
4.7
μ
F
C
7
C
6
22 nF
455 kHz
CF
1
AM IFT
CF
2
10.7 MHz
T
1
C
9
10 nF
4.7
μ
F
C
10
10 nF
C
11
C
12
470
μ
F
C
13
4.7
μ
F
220
μ
F
C
15
13915
2 pF
C
2
C
25
100 pF
6 pF
C
5
P
1
50 k
Volume
Antenna
FM
AM
100 nF
C
14
S
1
V
S
AM
L
3
33 pF
C
17
33 pF
C
18
L
4
FM
S
2
390
Z = 8
R
1
33 pF
C
16
Figure 17. Application circuit (low cost)
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