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參數(shù)資料
| 型號： | XR-215ACP |
| 廠商： | EXAR CORP |
| 元件分類： | XO, clock |
| 英文描述： | Monolithic Phase-Locked Loop |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 25 MHz, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-16 |
| 文件頁數(shù)： | 19/32頁 |
| 文件大小： | 331K |
| 代理商： | XR-215ACP |
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XR-215A
19
Rev. 1.01
16
V
CC
Figure 16. Circuit Connection for FM Demodulation
+12V
5K
5K
FM
Input
U1
XR-215A
2K
0.1 F
Cc
R
0
0.1 F
2K
Cc
300pF
Demodulated
Output
2K
8K
7.5K
R
F
Volume
Control
10nF (De-Emphasis)
C
0
R
x
50
C
1
50
C
1
R
P
10K
Cc Coupling Capacitor
Phase
Comp.
5
Op
Amp
8
4
15
7
1
3
2
14
13
9
V
EE
10
12
11
6
APPLICATIONS INFORMATION
FM Demodulation
Figure 16shows the external circuit connections to the XR-215A for frequency-selective FM demodulation. The choice
of C
0
is determined by the FM carrier frequency (see Figure 8.) The low-pass filter capacitor C
1
is determined by the
selectivity requirements. For carrier frequencies of 1 to 10MHz, C
1
is in the range of 10
C
0
to 30
C
0
. The feedback
resistor R
F
can be used as a “volume-control” adjustment to set the amplitude of the demodulated output. The
demodulated output amplitude is proportional to the FM deviation and to resistors R
0
and R
F
for +1% FM deviation it can
be approximated as:
V
OUT
R
0
R
F
1
0.6
R
X
mV rms
where all resistors are in k and R
X
is the range extension resistor connected across pins 9 and 10. For circuit operation
below 5MHz, R
X
can be omitted. For operation above 5MHz, R
X
750 is recommended.
Typical output signal/noise ratio and harmonic distortion are shown in Figure 17and Figure 18as a function of FM
deviation, for the component values shown in Figure 5.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| XR215CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-PHASE LOCKED LOOP |
| XR-215CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Phase-Locked Loop |
| XR-215D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Phase-Locked Loop |
| XR-215MD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Phase-Locked Loop |
| XR21B1411 | 制造商:EXAR 制造商全稱:EXAR 功能描述:Single Channel USB UART with Industry`s Smallest Package and Optimized Software Drivers |
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