Title :
Radio receiver front-end using time-based all-digital ADC (TAD)
Author :
Terasawa, Tomohito ; Kamiya, Yuji ; Kawashima, Hiroyuki ; Imai, Kenichiro ; Suzuki, Masanobu ; Watanabe, Takamoto ; Taguchi, Nobuyuki ; Sawada, Manabu ; Yu Hou ; Hirooka, Yoshiyuki ; Ninh Hong Phuc ; Miyahara, Masaya ; Matsuzawa, Akira
Author_Institution :
Denso Corp., Kariya, Japan
Abstract :
A direct-conversion RF-receiver IC implemented in 65nm CMOS, which has an RF front-end and all-digital differential time-based analog-to-digital converter (TAD) with 4-time-interleave technique for high resolution, is presented. The RF front-end contains passive mixers using wideband gm-cells and switches. When OFDM 16QAM RF signal (input power: -45.4dBm, BW: 20MHz) of 500M, 1.5G, and 2.5GHz is demodulated, EVM is -27.8, -27.4, and -17.3dB, respectively.
Keywords :
CMOS integrated circuits; OFDM modulation; analogue-digital conversion; mixers (circuits); quadrature amplitude modulation; radio receivers; 16QAM RF signal; 4-time-interleave technique; CMOS integrated circuits; OFDM; all-digital differential TAD converter; bandwidth 20 MHz; direct-conversion RF-receiver IC; passive mixers; radio receiver front-end; size 65 nm; time-based all-digital ADC; time-based analog-to-digital converter; CMOS integrated circuits; Delays; Frequency measurement; OFDM; Radio frequency; Receivers;
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2014 21st IEEE International Conference on
DOI :
10.1109/ICECS.2014.7050024
