參數(shù)資料
型號(hào)： TDA5220
廠商： INFINEON TECHNOLOGIES AG
英文描述： ASK/FSK Single Conversion Receiver
中文描述： 詢價(jià)/ FSK信號(hào)單一轉(zhuǎn)換接收器
文件頁(yè)數(shù)： 28/44頁(yè)
文件大?。?/td> 719K
代理商： TDA5220
Applications
4 - 8
TDA 5220
preliminary
Wireless Components
confidential
Target Specification, October 2001
4.6
ASK/FSK Switch Functional Description
The TDA5220 is containing an ASK/FSK switch which can be controlled via
Pin 15 (MSEL). This switch is actually consisting of 2 operational amplifiers that
are having a gain of 1 in case of the ASK amplifier and a gain of 11 in case of
the FSK amplifier in order to achieve an appropriate demodulation gain charac-
teristic. In order to compensate for the DC-offset generated especially in case
of the FSK PLL demodulator there is a feedback connection between the
threshold voltage of the bit slicer comparator (Pin 20) to the negative input of
the FSK switch amplifier.
In ASK-mode alternatively to the voltage at Pin 20 (SLN) a value of approx. 87%
of the peak-detector output-voltage at Pin 26 (PDO) can be used as the slicer-
reference level. The selection between these modes is controlled by Pin 16
(SSEL). This is shown in the following figure.
ask_fsk_datapath.WMF
Figure 4-7
ASK/FSK mode datapath
R
1
=100k
R
2
=100k
v = 1
19
21
22
20
R
4
=30k
R
3
=300k
DATA Out
A
D
typ. 2 V
1.5 V......2.5 V
0.18 mV/kHz
from RSSI Gen
(ASK signal)
C
1
C
2
R
C
+
-
-
+
ASK
FSK
Comp
25
PDO
26
R=390k
R=56k
C=100 nF
16
15
MSEL
+
-
-
+
CP
CM
1
H=ASK
L=FSK
H=CP
L=CM
SSEL
DETECTOR
PEAK
SLP
OOP
FFB
SLN
FSK PLL Demodulator
Data Filter
ASK mode: v=1
FSK mode: v=11
ASK/FSK Switch
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA5220T 制造商:Infineon Technologies AG 功能描述:RKE RX RECIEVER, TSSOP-28, 3K
TDA5220XUMA1 制造商:Infineon Technologies AG 功能描述:RF Receiver ASK/FSK 5V T/R 制造商:Infineon Technologies AG 功能描述:CONTROL - Tape and Reel 制造商:Infineon Technologies AG 功能描述:RECEIVER SHR FSK/ASK SGL TSSOP28
TDA5221 功能描述:射頻接收器 ASK/FSK SNGL Convrsn Receiver RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
TDA5221INCT-ND 制造商:Infineon Technologies AG 功能描述:
TDA5221XUMA1 制造商:Infineon Technologies AG 功能描述:RF Receiver ASK/FSK 5V T/R 制造商:Infineon Technologies AG 功能描述:CONTROL - Tape and Reel 制造商:Infineon Technologies AG 功能描述:RECEIVER SHR FSK/ASK SGL TSSOP28
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