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参数资料
| 型号： | EVB72001 |
| 英文描述： | EVB72001 EValuation board for TH72001 |
| 中文描述： | EVB72001评估板TH72001 |
| 文件页数： | 6/12页 |
| 文件大小： | 307K |
| 代理商： | EVB72001 |
EVB72001
315MHz FSK Transmitter
Evaluation Board Description
390127200101
Page 3 of 12
EVB Description
Rev. 002
Oct/02
PR
EL
IM
INA
RY
1 Theory of Operation
1.1
General
As depicted in Fig.1, the TH72001 transmitter consists of a fully integrated voltage-controlled oscillator
(VCO), a divide-by-32 divider (div32), a phase-frequency detector (PFD) and a charge pump (CP). An
internal loop filter determines the dynamic behavior of the PLL and suppresses reference spurious signals. A
Colpitts crystal oscillator (XOSC) is used as the reference oscillator of a phase-locked loop (PLL)
synthesizer. The VCO’s output signal feeds the power amplifier (PA). The RF signal power Pout can be
adjusted in four steps from Pout = –15 dBm to +6 dBm, either by changing the value of resistor RPS or by
varying the voltage VPS at pin PSEL. The open-collector output (OUT) can be used either to directly drive a
loop antenna or to be matched to a 50Ohm load. Bandgap biasing ensures stable operation of the IC at a
power supply range of 1.9 V to 5.5 V.
1.2
Block Diagram
Fig. 1: Block diagram with external components
VEE
XOSC
PA
XBUF
VCO
PLL
CP
PFD
32
PSEL
RPS
ROI
XTAL
8
5
3
2
antenna
matching
network
OUT
7
CX1
1
ASKDTA
6
VCC
mode
control
ENTX
4
low
voltage
detector
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| EVB72005-315-ASK-A | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:315MHz FSK/ASK Transmitter Evaluation Board Description |
| EVB72005-315-ASK-C | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:315MHz FSK/ASK Transmitter Evaluation Board Description |
| EVB72005-315-FKS-A | 功能描述:FSK/ASK TRANSMITTER EVALUATION B RoHS:是 类别:RF/IF 和 RFID >> RF 评估和开发套件，板 系列:- 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796 |
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