ASK DEMODULATOR DESIGN FOR PASSIVE UHF RFID TAG

• Main Author: Hidayana Hendrayana, Yusuf
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/39321
• Institution: Institut Teknologi Bandung

In this thesis a demodulator circuit block is designed as part of passive UHF RFID tag. The demodulator block function is to extract the modulated information signal at the RF signal input to the digital signal output. The circuit specifications of this design are derived from EPC Class-1 Generation-2 standards which complies to ISO 18000-6C. All circuits design in this thesis are done in 130 nm CMOS technology. The demodulator is designed with an envelope detector and comparator circuit. The demodulator design results are then simulated with the corner method for the ASK signal’s amplitude and bit rates. Simulation shows that the designed demodulator has worked as intented for typical ASK-PIE signals input Vpeak of 250 mV with a tolerance of ± 20%. Demodulator works in 6.25 ?s Tari for various bit rates from 80 kbps to 160 kbps as required by the standard. According to the temperature test, the demodulator is able to work in the temperature of -25 oC to 40 oC. Layout design also has been made according to the schematic design and has been verified with DRC, LVS, and ERC.