Name
Abstract | ||
|---|---|---|
This paper presents a low TX noise transmitter with digital modulated power amplifier (DPA) for UHF RFID reader System-on-Chip. With I/Q digital signals directly modulated on DPA, the transmitter eliminates the pulse shaping filter, up-conversion mixer and power amplifier driver, which are dominant noise contributors in a conventional RFID transmitter. A switch-mode power amplifier cell is adopted in the DPA, which suppresses the amplitude noise in the TX chain. An LO signal buffer strategy is proposed to minimize uncorrelated phase noise which cannot be cancelled by self-cancellation in the RFID receiver. A low noise self-adaptive LDO is designed for lowering TX noise and stable output power. The transmitter achieves a TX noise density lower than -145dBc/Hz and provides a peak output power of 24 dBm with 48% drain efficiency when transmitting CW signal. Through pre-distortion, the transmitter can achieve a spectrum mask with -50 dBc for ACPR1, -62 dBc for ACPR2 and -65dBc for ACPR3. The proposed transmitter is fabricated in a standard 0.18-μm CMOS process with an area of 1000×640μm2. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/ISCAS.2014.6865232 | ISCAS |
Keywords | Field | DocType |
cmos process,pulse shaping filter elimination,uncorrelated phase noise minimization,switch-mode power amplifier cell,cmos transmitter,cw signal,transmitter leakage,uhf rfid reader transmitter,tx noise density,digital cmos power amplifier,pre-distortion,lo signal buffer strategy,rfid receiver,cmos digital power amplifier (dpa),uhf rfid reader,efficiency 48 percent,system-on-chip,size 0.18 mum,radiofrequency identification,dpa,self-correlation,drain efficiency,power amplifier driver,low-noise self-adaptive ldo,up-conversion mixer,spectrum mask,tx noise,cmos digital integrated circuits,phase noise,tx noise transmitter,uhf rfid reader system-on-chip,amplitude noise,uhf power amplifiers,i-q digital signal,digital modulated power amplifier,system on chip,radio transmitters,computer architecture | Transmitter,Low-noise amplifier,Computer science,Phase noise,Electronic engineering,Noise temperature,Noise spectral density,Effective input noise temperature,RF power amplifier,Electrical engineering,Amplifier | Conference |
ISSN | Citations | PageRank |
0271-4302 | 0 | 0.34 |
References | Authors | |
0 | 6 | |