Open AccessA 750μW 3.5–4.5GHz FM-UWB transmitter
Author(s) -
Mohamed Ali,
Heba Shawkey,
Abdelhalim Zekry
Publication year - 2015
Publication title -
journal of electrical systems and information technology
Language(s) - English
Resource type - Journals
ISSN - 2314-7172
DOI - 10.1016/j.jesit.2015.03.012
Subject(s) - transmitter , voltage controlled oscillator , subcarrier , electrical engineering , amplifier , phase locked loop , cmos , transmitter power output , radio frequency , electronic engineering , center frequency , frequency synthesizer , signal (programming language) , phase noise , engineering , computer science , orthogonal frequency division multiplexing , voltage , band pass filter , channel (broadcasting) , programming language
This paper presents an ultra-low power frequency modulated ultra-wideband (FM-UWB) transmitter implemented in standard 130 nm CMOS technology. The transmitter operates in the range of 3.5–4.5 GHz with 4 GHz RF carrier frequency. The transmitter can accept input data rates up to 250 kbps. A relaxation oscillator is used to generate the subcarrier signal and a VCO for RF carrier generation. The center frequency of the VCO is periodically calibrated to avoid out of band operation. An integer-N phase-locked loop (PLL) is used for both subcarrier generation and RF VCO calibration, which needs only 500 ns to complete the calibration. A class-AB power amplifier is used to output the power under the FCC mask. The proposed FM-UWB transmitter consumes 750 μW from a 1.2 V supply