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參數(shù)資料
| 型號： | TDA5251F1 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | ASK/FSK 315MHz Wireless Transceiver |
| 中文描述： | 詢價/ FSK信號315MHz的無線收發(fā)器 |
| 文件頁數(shù)： | 20/88頁 |
| 文件大?。?/td> | 2086K |
| 代理商： | TDA5251F1 |
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TDA5251 F1
Version 1.0
Functional Description
Preliminary Specification
20
2003-02-18
Confidential
2.4.7
I/Q Limiters
The I/Q Limiters are DC coupled multistage amplifiers with offset-compensating feedback circuit
and an overall gain of approximately 80dB each in the frequency range of 100Hz up to 350kHz.
Receive Signal Strength Indicator (RSSI) generators are included in both limiters which produce DC
voltages that are directly proportional to the input signal level in the respective channels. The
resulting I- and Q-channel RSSI-signals are summed to the nominal RSSI signal.
2.4.8
FSK Demodulator
The output differential signals of the I/Q limiters are fed to a quadrature correlator circuit that is used
to demodulate frequency shift keyed (FSK) signals. The demodulator gain is 2.4mV/kHz, the
maximum frequency deviation is ±300kHz as shown in
Figure 2-4
below.
The demodulated signal is applied to the ASK/FSK mode switch which is connected to the input of
the data filter. The switch can be controlled by the
ASKFSK
pin (pin 4) and via the D11 bit in the
CONFIG register.
The modulation index
m
must be larger than 2 for correct demodulation of the signal.
Qaudricorrelator.wmf
Figure 2-4
Quadricorrelator Demodulation Characteristic
0,5
0,6
0,7
0,8
0,9
1
1,1
1,2
1,3
1,4
1,5
1,6
-350 -300 -250 -200 -150 -100 -50
0
50
100
150 200
250 300 350
f /kHz
U
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA5251F1_07 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK/FSK 315MHz Wireless Transceiver |
| TDA5251XUMA1 | 制造商:Infineon Technologies AG 功能描述:RF Transceiver ASK/FSK 2.5V/3.3V/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:TXRX FSK/ASK SGL LP TSSOP-38 |
| TDA5252 | 功能描述:射頻接收器 ASK/FSK WIRELESS TRANSCEIVER 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 |
| TDA5252G2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK/FSK 915MHz Wireless Transceiver |
| TDA5252XUMA1 | 制造商:Infineon Technologies AG 功能描述:RF Transceiver ASK/FSK 2.5V/3.3V/5V 38-Pin TSSOP 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:TXRX FSK/ASK SGL LP TSSOP-38 |
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