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参数资料
| 型号： | DR-TRC105-450-EV |
| 厂商： | RFM |
| 文件页数： | 7/67页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION 450MHZ RFM RFIC |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 频率： | 447MHz ~ 451MHz |
| 适用于相关产品： | TRC105 |
| 已供物品： | 2 个板，天线，电池 |
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2.1 RF Port
The receiver and the transmitter share the same RF pins. Figure 3 shows the implementation of the common
front-end. In transmit mode, the PA and the PA regulator are on; the voltage on VDD_PA pin is the nominal volt-
age of the regulator, about 1.8 V. The external inductances L1 and L4 are used for the PA. In receive mode, both
PA and PA regulator are off, and VDD_PA is tied to ground. The external inductances L1 and L4 are used for bi-
asing and matching the LNA, which is implemented as a common gate amplifier.
Figure 3
2.2 Transmitter
The TRC105 is set to transmit mode when MCFG00_Chip_Mode[7..5] bits are set to 100. In Continuous data
mode the transmitted data is sent directly to the modulator. The host microcontroller is provided with a bit rate
clock by the TRC105 to clock the data; using this clock to send the data synchronously is mandatory in FSK con-
figuration and optional in OOK configuration. In Buffered and Packet data modes the data is first written into the
64-byte FIFO via the SPI interface; data from the FIFO is then used by the modulator.
At the front end of the transmitter, I and Q signals are generated by the base-band circuit which contains a digital
waveform generator, two D/A converters and two anti-aliasing low-pass filters. The I and Q signals are two quad-
rature sinusoids whose frequency is the selected frequency deviation. In FSK mode, the phase shift between I
and Q is switched between +90° and -90° according to the input data. The modulation is then performed at this
stage, since the information contained in the phase shift will be converted into a frequency shift when the I and Q
signals are combined in the first mixers. In OOK mode, the phase shift is kept constant whatever the data. The
combination of the I and Q signals in the first mixers creates a fixed frequency signal at a low intermediate fre-
quency which is equal to the selected frequency deviation. After D/A conversion, both I and Q signals are filtered
by anti-aliasing filters whose bandwidth is programmed with the register TXCFG1A_TXInterpfilt[7..4] . Behind the
filters, a set of four mixers combines the I and Q signals and converts them into two I and Q signals at the second
intermediate frequency which is equal to 1/8 of the LO frequency, which in turn is equal to 8/9 of the RF frequen-
cy. These two new I and Q signals are then combined and up-converted to the desired RF frequency by two
quadrature mixers fed by the LO signals. The signal is then amplified by a driver and power amplifier stage.
MCFG05_PA_Ramp[7..6]
00
01
10
11
T PA (μs)
3
8.5
15
23
Rise/fall (μs)
2.5/2
5/3
10/6
20/10
Table 2
www.RFM.com E-mail: info@rfm.com
? 2009-2013 by RF Monolithics, Inc.
Technical support +1.800.704.6079
Page 7 of 67
TRC105 - 05/29/13
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相关代理商/技术参数 |
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| DRTU06D06 | 功能描述:时间延迟和计时继电器 180-240VAC/DC 1-60VDC 6A RoHS:否 制造商:Crydom 显示器类型:Hand Dial 电源电压:280 VAC 定时范围: 触点形式: 触点额定值:6 A 端接类型:DIN Rail |
| DRTU24A06 | 功能描述:时间延迟和计时继电器 180-240VAC/DC 24-280VAC 6A RoHS:否 制造商:Crydom 显示器类型:Hand Dial 电源电压:280 VAC 定时范围: 触点形式: 触点额定值:6 A 端接类型:DIN Rail |
| DRTU24A06R | 功能描述:时间延迟和计时继电器 90-140VAC/DC 24-280VAC 6A RoHS:否 制造商:Crydom 显示器类型:Hand Dial 电源电压:280 VAC 定时范围: 触点形式: 触点额定值:6 A 端接类型:DIN Rail |
| DRTU24B06 | 功能描述:时间延迟和计时继电器 90-140VAC/DC 24-280VAC 6A RoHS:否 制造商:Crydom 显示器类型:Hand Dial 电源电压:280 VAC 定时范围: 触点形式: 触点额定值:6 A 端接类型:DIN Rail |
| DRTU24B06R | 功能描述:时间延迟和计时继电器 2-24VAC/DC 24-280VAC 6A RoHS:否 制造商:Crydom 显示器类型:Hand Dial 电源电压:280 VAC 定时范围: 触点形式: 触点额定值:6 A 端接类型:DIN Rail |
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