參數(shù)資料
型號(hào)： XR2211M
廠商： Exar Corporation
文件頁(yè)數(shù)： 18/24頁(yè)
文件大?。?/td> 242K
代理商： XR2211M
XR-2211
18
Rev. 3.01
Linear FM Detection
XR-2211 can be used as a linear FM detector for a wide
range of analog communications and telemetry
applications. The recommended circuit connection for
this application is shown in Figure 13. The demodulated
output is taken from the loop phase detector output (pin
11), through a post-detection filter made up of R
F
and C
F
,
and an external buffer amplifier. This buffer amplifier is
necessary because of the high impedance output at pin
11. Normally, a non-inverting unity gain op amp can be
used as a buffer amplifier, as shown in Figure 13.
The FM detector gain, i.e., the output voltage change per
unit of FM deviation can be given as:
V
OUT
R
1
·V
REF
100·R
0
where VR is the internal reference voltage (V
REF
= V
CC
/2
- 650mV). For the choice of external components R
1
, R
0
,
C
D
, C
1
and C
F
, see the section on design equations.
Timing
6
Input
2
5
7
V
+
Figure 14. Equivalent Schematic Diagram
20K
20K
Internal Voltage
Reference
Input Preamplifier
and Limiter
10K
10K
Quadrature
Phase Detector
Lock
Detect
Filter
Lock Detect
Outputs
Lock Detect
Comparator
FSK
Data
Output
FSK
Comparator
Input
Loop
Detector
Output
A
From
VCO
2K
A’
Loop Phase Detector
8K
12
R
0
13
B
B’
C014
Voltage Controlled
Oscillator
REF
Voltage
Output
10
B
From
VCO
B’
3
2K
A
1
4
Ground
FSK Comparator
8
11
A’
Resistor
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR-2211M 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASK/FSK Demodulator
XR2211N 制造商:EXAR 制造商全稱:EXAR 功能描述:
XR-2211N 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASK/FSK Demodulator
XR-2211P 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASK/FSK Demodulator
XR2212 制造商:EXAR 制造商全稱:EXAR 功能描述:Precision Phase-Locked Loop
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