Details

Autor(en) / Beteiligte

• Sun, Zheng
• Xu, Dingxin
• Qiu, Junjun
• Liu, Zezheng
• Zhang, Yuncheng
• Huang, Hongye
• Liu, Hanli
• Liu, Bangan
• Li, Zheng
• Pang, Jian
• Shirane, Atsushi
• Okada, Kenichi

Titel

A 0.25 mm2 BLE Transmitter with Direct Antenna Interface and 19% System Efficiency Using Duty-Cycled Edge-Timing Calibration

Ist Teil von

• ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference (ESSCIRC), 2021, p.499-502

Ort / Verlag

IEEE

Erscheinungsjahr

2021

Quelle

IEEE Xplore

Beschreibungen/Notizen

• This paper demonstrates a compact BLE transmitter (TX) achieving fully on-chip integration and high system-efficiency. This BLE TX is constructed based on a 1.2 GHz 8-phases current-reused ring oscillator (RO) with a digital phase-locked loop (PLL). To mitigate the spurious emission, including HD2 caused by phase mismatches, an edge-timing calibration is proposed by reusing the digital PLL in this paper. A transformer-based Class-D PA with implicit LC-notch is implemented to improve the system efficiency with higher harmonic suppression for both HD2 and HD3 with a compact on-chip area. The presented TX supports both 1 Mbps and 2 Mbps GFSK modulation with low power consumption.