2,4 GHZ low IF 1,5 Mbps transceiver
14 August 2002
Telecoms, Datacoms, Wireless, IoT
The ML2725 from Micro Linear can be used as a single chip direct sequence spread spectrum (DSSS) telephone transceiver or general purpose frequency shift keying (FSK) radio transceiver. It is designed to work in frequency ranges of 2,4 GHz. The device integrates the frequency generation, receive and transmit functions for data rates up to 1,5 Mbps.
The ML2725 contains a proprietary dual conversion low IF receiver with all channel selectivity. The first mixer converts the 2,4 GHz RF input signal to a high IF of 800 MHz. An image reject mixer brings the 800 MHz IF signal down to a low IF frequency of 1,024 MHz, so all IF filtering, IF gain, and demodulation is performed at 1,024 MHz. This provides all the benefits of direct conversion to baseband and minimises the need for RF filtering. Also, the ML2725 can operate with either a low cost LC filter or a SAW filter.
A single 1,6 GHz synthesizer is used for both the receiver LO and the transmitter signal generation. The VCO and PLL are completely integrated, including the VCO resonator and tuning circuits. On transmit, the ML2725 is intended to be used with an external frequency tripler. The transmit output frequency is nominally 800 MHz, with a typical output power of 0 dBm. Transmit data is used to frequency modulate the VCO with the synthesizer open loop. The transmit data filter and modulation compensation circuits are also integrated.
The ML2725 contains its own DC regulation which allows the IC to operate over a wide power supply voltage range. It also has a simple baseband interface for transmit power management, PLL control and detection, and RSSI.
Further reading:
What does Wi-Fi 7 mean for South African networks?
Telecoms, Datacoms, Wireless, IoT
With Wi-Fi 7 (802.11be), we are finally looking at a standard that was built, not just for more devices, but for the new way networks are used.
Read more...
Multiprotocol wireless SoC
RF Design
Telecoms, Datacoms, Wireless, IoT
The nRF54LM20A from Nordic Semiconductor is a multiprotocol wireless System-on-Chip designed for demanding designs in Bluetooth devices.
Read more...
High performance communication
iCorp Technologies
Telecoms, Datacoms, Wireless, IoT
Quectel’s FCS950R is a high-performance Wi-Fi 5 and Bluetooth 4.2 module that can deliver a maximum data rate up to 433,3 Mbps in 802.11ac mode.
Read more...
Expanded STM32WL3x line for IoT sensors
Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The STM32WL31x and STM32WL30x are more tailored versions of the STM32WL33x for designers who wish to focus on specific features, while lowering their bill of materials.
Read more...
Full-band GNSS helical antenna
RF Design
Telecoms, Datacoms, Wireless, IoT
A key feature of Calian’s HC3990XF antenna design is that it does not require a ground plane, making it ideal for size-constrained applications.
Read more...
BLE and BT Mesh module
iCorp Technologies
Telecoms, Datacoms, Wireless, IoT
The HM-BT4531 from HOPERF is a BLE data transmission module that features an ARM Cortex-M0 32-bit processor.
Read more...
Espressif entering the Wi-Fi 6E market
iCorp Technologies
Telecoms, Datacoms, Wireless, IoT
Espressif Systems is entering the Wi-Fi 6E market, extending its connectivity portfolio into the domain of high-throughput, low-latency wireless solutions.
Read more...
Ultra-low jitter clock buffers
Altron Arrow
Telecoms, Datacoms, Wireless, IoT
New SKY53510/80/40 family of clock fanout buffers from Skyworks are purpose-built for data centres, wireless networks, and PCIe Gen 7 applications.
Read more...
Cutting-edge broadband power amplifier
RFiber Solutions
Telecoms, Datacoms, Wireless, IoT
Designed for high efficiency and reliability, the WPGM0206012M from WAVEPIA is a cutting-edge broadband GaN MMIC power amplifier operating from 500 MHz to 8,5 GHz.
Read more...
The trends driving uptake of IoT Platform as a Service
Trinity IoT
Editor's Choice Telecoms, Datacoms, Wireless, IoT
IoT platforms, delivered as a service, are the key that will enable enterprises to leverage a number of growing trends within the IT space, and access a range of benefits that will help them grow their businesses.
Read more...
printer friendly version