20.500.12556/RUL-136540 Design of multi standard near field communication outphasing transmitter with modulation wave shaping The aim of this work is to tackle the problem of modulation wave shaping in the field of near field communication (NFC) radio frequency identification (RFID). For this purpose, a highefficiency transmitter circuit was developed to comply with the strict requirements of the newest EMVCo and NFC Forum specifications for pulse shapes. The proposed circuit uses an outphasing modulator that is based on a digital-to-time converter (DTC). The DTC based outphasing modulator supports amplitude shift keying (ASK) modulation, operates at four times the 13.56 MHz carrier frequency and is made fully differential in order to remove the parasitic phase modulation components. The accompanying transmitter logic includes lookup tables with programmable modulation pulse wave shapes. The modulator solution uses a 64-cell tapped current controlled fully differential delay locked loop (DLL), which produces a 360° delay at 54.24 MHz, and a glitch-free multiplexor to select the individual taps. The outphased output from the modulator is mixed to create an RF pulse width modulated (PWM) output, which drives the antenna. Additionally, this implementation is fully compatible with D-class amplifiers enabling high efficiency. A test circuit of the proposed differential multi-standard reader’s transmitter was simulated in 40 nm CMOS technology. Stricter pulse shape requirements were easily satisfied, while achieving an output linearity of 0.2 bits and maximum power consumption under 7.5 mW. RFID EMVCo NFC outphasing PWM DLL TX wave shaping radiofrekvenčna identifikacija EMVCo pulzno širinska modulacija zanka z zakasnilno linijo oblikovanje oddajnih impulzov true false true Angleški jezik Slovenski jezik Članek v reviji 2022-05-10 12:28:07 2022-05-10 12:28:09 2022-09-15 04:13:58 0000-00-00 00:00:00 2021 0 0 17 str. iss. 2, art. 188 Vol. 10 Jan. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.3 2079-9292 10.3390/electronics10020188 100798723 electronics-10-00188-v2.pdf electronics-10-00188-v2.pdf 1 8ACD9B86E3C2DA8E0E442D937B8B84C0 12eecdecc80583046c56edf07be8ca883ded9035e60afcd8d4a50d3ad5159985 12d08aed-d04c-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156231 https://www.mdpi.com/2079-9292/10/2/188 1 c8aa1219-d04b-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156230 Fakulteta za elektrotehniko 0 0 0