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This paper presents a low-power CMOS single-chip transceiver for sub-GHz wireless sensor network applications, which complies IEEE 802.15.4-2012 standard. It embodies RF transceiver section based on direct-conversion transmitter and low-IF receiver architecture. To validate its operation, the prototype is fabricated in 0.18um GF standard CMOS process. It shows +5dBm TX output power and −85dBm RX sensitivity...
RFID systems are based on backscattering communications, and this encourages research on how to guarantee a reliable RX performance under simultaneous TX/RX operation. To isolate RX from the TX self-jammer, the RFID transceivers are generally accompanied by an off-chip circulator or isolator. This has advantages in selectivity between tag signal and blocker, but it results in a low level of integration...
This paper presents a switching PA-based polar transmitter which achieves uniform and robust performances under process, voltage, and temperature variations. A new approach utilizing current driven envelope signal is proposed, leading to much more accurate control of output power of the PA. In addition, the proposed adaptive LO technique extends the available linear control range of the PA. Fabricated...
The proposed CMOS digital-to-RF transmitter with filtering, which is designed in TSMC 0.18 mum CMOS technology, merges RF functions, including pulse shape filtering and frequency up-mixing into a simple DAC (digital-to-analog converter) circuit building block, named as DRFC (digital-to-RF with filtering converter). Moreover, the capability to handle data with wide bandwidth is added to DRFC without...
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