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參數(shù)資料
| 型號： | TDK5100 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | ASK/FSK Transmitter 868/433 MHz |
| 中文描述： | 詢價/ FSK發(fā)射器433分之868兆赫 |
| 文件頁數(shù)： | 26/40頁 |
| 文件大?。?/td> | 629K |
| 代理商： | TDK5100 |
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CL
Applications
3 - 7
TDK 5100
Wireless Components
Specification, October 2002
3.5
Application Hints on the Crystal Oscillator
1. Application Hints on the crystal oscillator
The crystal oscillator achieves a turn on time less than 1 msec when the
specified crystal is used. To achieve this, a NIC oscillator type is implemented
in the TDK 5100. The input impedance of this oscillator is a negative resistance
in series to an inductance. Therefore the load capacitance of the crystal CL
(specified by the crystal supplier) is transformed to the capacitance Cv.
CL:
crystal load capacitance for nominal frequency
ω
:
angular frequency
L:
inductance of the crystal oscillator
Example for the ASK-Mode:
Referring to the application circuit, in ASK-Mode the capacitance C7 is replaced
by a short to ground. Assume a crystal frequency of 13.56 MHz and a crystal
load capacitance of CL = 20 pF. The inductance L at 13.5 MHz is about 4.6
μ
H.
Therefore C6 is calculated to 12 pF.
IC
-R
L
f, CL
Cv
L
Cv
2
1
1
ω
+
=
Formula 1)
6
1
1
2
C
L
CL
Cv
=
+
=
ω
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| TDK5100F | 功能描述:射頻接收器 2.1-4 V ASK/FSK Transmitter IC 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 |
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