A Gated FM-UWB System With Data-Driven Front-End Power Control

Author

Zhou, Bo ; Qiao, Jian ; He, Rui ; Liu, Jinghui ; Zhang, Wei ; Lv, Hang ; Rhee, Woogeun ; Li, Yongming ; Wang, ZhiHua

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

Volume

59

Issue

6

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

1348

Lastpage

1358

Abstract

This paper presents a frequency modulated ultra-wideband (FM-UWB) transceiver system with RF submodules gated by a data-driven control signal. With the control signal, intermittent operation of key building blocks such as a VCO in the transmitter and a wideband FM demodulator in the receiver is realized. To enable an effective dynamic power control, the transmitter generates higher subcarrier frequency and modulation index than conventional FM-UWB transmitters by utilizing an 8-modulo fractional-N PLL in which a triangular waveform is generated by a relaxation VCO. In the receiver, an envelope detector monitors the presence of incoming signal and enables the data-edge-triggered power control for a wideband FM demodulator and other blocks. A prototype 3.5-4.1 GHz FM-UWB transceiver for on-chip wireline testing is implemented in 0.18-μm CMOS. Experimental results show that the proposed gated FM-UWB system successfully demodulates the FSK information, achieving nearly 53% power saving with the data-driven power control enabled.

Keywords

CMOS integrated circuits; demodulators; frequency shift keying; integrated circuit testing; microwave devices; phase locked loops; power control; radio transceivers; telecommunication control; ultra wideband communication; voltage-controlled oscillators; waveform generators; CMOS; FSK information; PLL; RF submodule; data driven front end power control; data-edge-triggered power control; dynamic power control; envelope detector; frequency 3.5 GHz to 4.1 GHz; frequency modulated ultrawideband transceiver system; gated FM-UWB system; modulation index; on-chip wireline testing; relaxation VCO; size 0.18 mum; triangular waveform; wideband FM demodulator; Frequency locked loops; Frequency shift keying; Phase locked loops; Power control; Radio frequency; Voltage-controlled oscillators; Demodulator; FLL; FM; PLL; UWB; dynamic power control; transceiver;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2011.2173401

Filename

6104400