Name
Abstract | ||
|---|---|---|
With growing interest in the internet-of-things (IoT), there has been increasing demand for wireless transmission of information captured by various sensors with minimum power dissipation, which is difficult to achieve with existing solutions such as Zigbee and Bluetooth-LE. Accordingly, there has been a high demand for an ultra-low power (ULP) transceiver that reduces the power by more than an order of magnitude relative to that of existing solutions. Most of the previously reported ULP receivers (RXs) are developed as single-channel devices focusing on low power consumption while adopting a high-Q MEMS device or a crystal oscillator (XO). However, for proper utilization of the IoT, e.g., accommodating multiple sensors at the same time and place, multichannel operation is essential. There have been reports of super-regenerative and injection-locking-based FSK RXs as multichannel radios with a limited signal-to-interferer ratio (SIR), making them susceptible to the adjacent channel interferers. In the paper, a 2-tone modulation scheme that sacrifices the spectral efficiency and data-rate is adopted for in-band interference tolerance. For multichannel operation with an adequate SIR, downconversion is an optimum solution. However, the power burden of PLL-based LO generation impedes its adoption for ULP RX. This work focuses on reducing the power of LO generation blocks in the ULP OOK RX. Considering the relaxed frequency stability requirement of OOK modulation, a receiver-based FLL (RBFLL) that adopts the RX chain as a part of the FLL as a substitute to the power-hungry divider is proposed. Implemented in 65nm CMOS, a 2.4GHz multichannel ULP OOK RX with the RBFLL achieves -83dBm sensitivity at 1 Mb/s while dissipating 227μW from a 0.6V supply. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.1109/ISSCC.2015.7063012 | Solid- State Circuits Conference - |
Keywords | Field | DocType |
bluetooth,cmos integrated circuits,internet of things,zigbee,amplitude shift keying,crystal oscillators,frequency locked loops,micromechanical devices,radio transceivers,2-tone modulation,bluetooth-le,cmos integrated circuit,internet-of-things,mems device,ook modulation,pll-based lo generation,crystal oscillator,current 13.1 a,frequency 2.4 ghz,injection-locking,multichannel ook receiver,multichannel ulp ook rx,multichannel radios,multiple sensors,power 227 muw,power dissipation,power-hungry divider,receiver-based fll,single-channel devices,size 65 nm,ultra-low power transceiver,voltage 0.6 v,wireless transmission,radio frequency,frequency control,frequency shift keying | Phase-locked loop,Transceiver,Adjacent channel,Computer science,Frequency-shift keying,CMOS,Automatic frequency control,Electronic engineering,Spectral efficiency,On-off keying,Electrical engineering | Conference |
Citations | PageRank | References |
2 | 0.45 | 5 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Jae-Seung Lee | 1 | 58 | 16.02 |
| Joo-Myoung Kim | 2 | 15 | 1.96 |
| lee jaesup | 3 | 2 | 0.45 |
| Seok-Kyun Han | 4 | 70 | 12.10 |
| Sang-Gug Lee | 5 | 427 | 85.52 |