Slide 1 Weidong Gao(Potevio) Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Injection Locked Receiver with Multi-phase Ring Oscillators Date Submitted: July 11, 2014 Source: Weidong Gao, Xiaopeng Yu, Jingwen Liu, Wei Hu Company: Potevio Information Technology Co., Ltd, Zhejiang Univercity Address: No.6 Haidian North Second Street, Haidian District, Beijing , China Contact: Weidong Gao Voice: Re: In response to TG4q Call for proposals Abstract: This contribution demonstrates ULP Low Power receiver design. Notice:This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P doc.: IEEE q Submission July 2014

Injection Locked Receiver with Multi- phase Ring Oscillators July, 2014 Weidong Gao July 2014 Weidong Gao(Potevio)Slide 2Submission doc.: IEEE q

July 2014 Weidong Gao(Potevio)Slide 3 Abstract This presentation demonstrate a new receiver architecture for ultra-low power receiver suitable for sub-GHz and GHz range short-range communications. Submission doc.: IEEE q

July 2014 Weidong Gao(Potevio)Slide 4 Review of TG4q PHY bands and Data rates PHY(MHz)Frequency band(MHz) Spreading parametersData parameters Chip rate (k chip/s) Bit rate (kb/s) Symbol rate (k symbol/s) Symbols 868/ Binary Binary ary Orthogonal The standard offers two PHY options based on the frequency band. Both are based on direct sequence spread spectrum (DSSS). The data rate is 250kbps at 2.4GHz, 40kbps at 915MHz and 20kbps at 868MHz. The higher data rate at 2.4GHz is attributed to a higher-order modulation scheme. Lower frequency provide longer range due to lower propagation losses. Low rate can be translated into better sensitivity and larger coverage area. Higher rate means higher throughput, lower latency or lower duty cycle.[1] Submission doc.: IEEE q

Review of Ultra-Low Power Receivers-1 Envelop detection of a self-demodulator (w/o oscillator) 1.W/O oscillator, it is able to work at wide-band 2.Simple typology, low power 3.LNA typical gain 10-20dB July 2014 Weidong Gao(Potevio)Slide 5 doc.: IEEE q Submission

Review of Ultra-Low Power Receivers-2 Injection locked oscillator based receiver(w oscillator) 1.W/O low noise amplifier 2.Simple typology, low power 3.LNA typical gain 10-20dB, but with ILO, the gain of input weak signal can higher than 40dB July 2014 Weidong Gao(Potevio)Slide 6Submission doc.: IEEE q

Design consideration of ILO based receiver 1.Carrier Frequency 2.Types of Oscillators 3.Bandwidth or data-rate 4.Locking range of the oscillator 5.Potential fading of IF signal due to non-coherent demodulation Here a phase-difference between received RF signal and ILO’s output inducing potential fading of output signal July 2014 Weidong Gao(Potevio)Slide 7Submission doc.: IEEE q

The Ring Oscillator based ILO Ring-Oscillator Delay-cell July 2014 Weidong Gao(Potevio)Slide 8 doc.: IEEE q Submission

The output frequency of the ring oscillator V BP (V) f 0 (Hz)-3.161G2.916G2.693G2.491G2.426G V BP (V) f 0 (Hz)2.386G2.352G2.315G2.307G2.140G1.990G V BP (V) f 0 (Hz)1.720G1.519G1.355G1.129G1.098G987.94M V BP (V) f 0 (Hz)885.84M790.83M700.48M613.70M529.86M448.19M V BP (V) f 0 (Hz)369.62M298.84M240.47M195.23M160.5M133.39M The ring oscillator is able to cover 400MHz to 3GHz frequency ranges July 2014 Weidong Gao(Potevio)Slide 9 doc.: IEEE q Submission

The operation of signal recovery A receiver is designed in a 40nm CMOS technology, the input OOK RF signal, the output of IF signal and recovered data are shown in the Figure above. The data rate can be as high as 10Mbps, the power consumption of the receiver is less than 1mW. July 2014 Weidong Gao(Potevio)Slide 10 doc.: IEEE q Submission

The ILO based receiver with I/Q path By Implement I/Q paths, the IF fading cased by non-coherent demodulator can be cancelled. July 2014 Weidong Gao(Potevio)Slide 11 doc.: IEEE q Submission

The ILO with I/Q outputs The Ring Oscillator The Delay Cell July 2014 Weidong Gao(Potevio)Slide 12 doc.: IEEE q Submission

Conclusion TG4q PHY bands and Data rates is reviewed as the guide line. Frequency bands for WBAN is reviewed as additional reference. The implementation of injection locked oscillator based receiver which suitable for low power consumption is reviewed, and designed. The ring oscillator based ILO receiver is suitable for short range, low data rate implementation. July 2014 Weidong Gao(Potevio)Slide 13 doc.: IEEE q Submission

References [1] SC Ergen"ZigBee/IEEE Summary"September 10, 2004 [2]A. W. ASTRIN, H.-B. LI, and R. KOHNO, "standardization forbody area networks, IEICE Transactions on Communications", vol. E92.B, no. 2, pp , [3] Li, X., Baltus, P.G.M., Zeijl, P.T.M. van, Milosevic, D., Roermund, A.H.M. van, “A 70 GHz 10.2 mW Self-demodulator in 65-nm CMOS Technology,” in Proceedings of IEEE Custom Integrated Circuit Conference (CICC 2010), San Jose, US, Sep July 2014 Weidong Gao(Potevio)Slide 14Submission doc.: IEEE q