期刊
IEEE JOURNAL OF SOLID-STATE CIRCUITS
卷 52, 期 4, 页码 1144-1162出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2017.2654322
关键词
All-digital PLL (ADPLL); Bluetooth low energy (BLE); digitally controlled oscillator (DCO); discrete-time (DT) receiver (RX); Gaussian frequency shift keying (GFSK); intermediate frequency (IF); Internet of Things (IoT); low-power (LP) transceiver (TRX); matching network; transmit/receive (T/R) switch; transmitter (TX)
资金
- CAPES Foundation, Ministry of Education of Brazil [99999.011662/2013-01]
- European Research Council Consolidator [307624 TDRFSP]
- Science Foundation Ireland [14/RP/I2921]
We present an ultra-low-power Bluetooth low-energy (BLE) transceiver (TRX) for the Internet of Things (IoT) optimized for digital 28-nm CMOS. A transmitter (TX) employs an all-digital phase-locked loop (ADPLL) with a switched current-source digitally controlled oscillator (DCO) featuring low frequency pushing, and class-E/F-2 digital power amplifier (PA), featuring high efficiency. Low 1/f DCO noise allows the ADPLL to shut down after acquiring lock. The receiver operates in discrete time at high sampling rate (similar to 10 Gsamples/s) with intermediate frequency placed beyond 1/f noise corner of MOS devices. New multistage multirate charge-sharing bandpass filters are adapted to achieve high out-of-band linearity, low noise, and low power consumption. An integrated on-chip matching network serves to both PA and low-noise transconductance amplifier, thus allowing a 1-pin direct antenna connection with no external band-selection filters. The TRX consumes 2.75 mW on the RX side and 3.7 mW on the TX side when delivering 0 dBm in BLE.
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