Paper Info
Title
26.1 A 5.5mW ADPLL-based receiver with hybrid-loop interference rejection for BLE application in 65nm CMOS.
Abstract
Various Ultra-Low-Power (ULP) RX architectures [1–4] for Bluetooth™ Low Energy (BLE) have been developed for minimizing the RX power consumption. A PLL-based RX architecture [1] is very attractive to improve the energy efficiency. While the single-channel configuration without multi-bit ADC realizes under 3mW power consumption and over −90dBm sensitivity, the 2nd and 3rd Adjacent Channel Interference Rejections (ACRs) do not meet the BLE requirements. Although the ACR can be improved by inserting high-order LPFs into the regeneration loop, it critically degrades the closed-loop stability. The Sliding IF (SIF) architecture is an alternative approach to overcome the ACR issue with high-energy efficiency. The reported receivers in [2,3] succeed in achieving over 20dB ACR, however, the SIF still has a problem of low out-of-band blocker tolerance because of unwanted signal at the image frequency. An off/on chip bandpass filter inserted at the front of the LNA can reject the image signal, which incurs a signal loss and degrades the energy efficiency of the RX. This paper presents a new PLL-based RX with hybrid loop that achieves over 20dB 2nd/3rd ACR without any external RF filters. The proposed RX employs two key features: 1) the high-interference-tolerance hybrid-loop structure based on an ADPLL, and 2) a novel single-channel receiving method, which enables the conversion of the constellation from FSK to a differential BPSK (DBPSK) signal.
Year
Venue
Field
2016
ISSCC
Phase-locked loop,Computer science,Frequency-shift keying,Adjacent-channel interference,Automatic frequency control,Electronic engineering,CMOS,Bandwidth (signal processing),Interference (wave propagation),Electrical engineering,Phase-shift keying
DocType
Citations 
PageRank 
Conference
2
0.65
References 
Authors
2
7
Name
Order
Citations
PageRank
Hidenori Okuni1204.41
Akihide Sai2208.25
Tuan Thanh Ta3186.20
Satoshi Kondo416523.86
Takashi Tokairin572.51
Masanori Furuta6174.42
Tetsuro Itakura718733.44