A 2.4pJ/bit ASK demodulator with 100% modulation rate for 13.56MHz NFC/RFID applications

Author

Guangjie Cai ; Pun, Alan ; Kwong, David ; Wang, K.C.

Author_Institution

Hong Kong Appl. Sci. & Technol. Res. Inst., Hong Kong, China

fYear

2014

fDate

1-5 June 2014

Firstpage

734

Lastpage

737

Abstract

In this paper, an Amplitude Shift Keying (ASK) demodulator circuit for Near Field Communication (NFC) target mode or Radio Frequency Identification (RFID) tag is designed by using sample and hold method. It features envelope detector, switch capacitor filter, dynamic comparator, clock extractor and phase generator. This demodulator was demonstrated and simulated in TSMC 0.18um CMOS technology with an average power of 32uW power consumption at 13.56Mbps Non-Return-to-Zero (NRZ) date rate for a carrier frequency of 13.56MHz. The minimum input voltage swing is 200mVpp.

Keywords

CMOS integrated circuits; amplitude shift keying; capacitors; comparators (circuits); demodulators; near-field communication; radiofrequency identification; sample and hold circuits; ASK demodulator circuit; NFC-RFID applications; NRZ; TSMC CMOS technology; amplitude shift keying; bit rate 13.56 Mbit/s; carrier frequency; clock extractor; dynamic comparator; envelope detector; frequency 13.56 MHz; modulation rate; near field communication; non-return-to-zero; phase generator; power 32 muW; radio frequency identification; sample and hold method; switch capacitor filter; Amplitude shift keying; Capacitors; Clocks; Demodulation; Envelope detectors; Radiofrequency identification; ASK demodulation; ASK demodulator; NFC; RFID tag; comparator; envelope detector; sample and hold;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2014 IEEE International Symposium on

Conference_Location

Melbourne VIC

Print_ISBN

978-1-4799-3431-7

Type

conf

DOI

10.1109/ISCAS.2014.6865240

Filename

6865240