Title :
A multiband LTE SAW-less CMOS transmitter with source-follower-drived passive mixers, envelope-tracked RF-PGAs, and Marchand baluns
Author :
Kihara, Takao ; Sano, Tomohiro ; Mizokami, Masakazu ; Furuta, Yoshikazu ; Nakamura, Takahiro ; Hokazono, Mitsuhiro ; Maruyama, Takaya ; Toyota, Kenji ; Maeda, Koji ; Akamine, Yukinori ; Yamawaki, Taizo ; Heima, Testuya ; Hori, Kazuaki ; Sato, Hisayasu
Author_Institution :
Renesas Electron. Corp., Itami, Japan
Abstract :
We present a multiband LTE SAW-less CMOS transmitter. Source followers, which drive passive mixers, contribute to the small-area and low-power transmitter. An envelope-tracking technique improves the linearity of RF programmable gain amplifiers, and Marchand baluns are suitable for multiband operation. The transmitter, which includes digital-to-analog converts and a phase-locked loop, covers 700 MHz to 2.6 GHz with -42 dBc ACLR. RX-band noise of -161 dBc/Hz is good enough for SAW-less operation.
Keywords :
CMOS integrated circuits; Long Term Evolution; UHF amplifiers; UHF integrated circuits; UHF mixers; baluns; digital-analogue conversion; phase locked loops; Marchand balun; RF programmable gain amplifiers; digital-to-analog converts; drive passive mixers; envelope-tracked RF-PGA; frequency 700 MHz to 2.6 GHz; low-power transmitter; multiband LTE SAW-less CMOS transmitter; phase-locked loop; small-area transmitter; source-follower-drived passive mixers; Impedance matching; Linearity; Mixers; Noise; Phase locked loops; Radio transmitters; CMOS; LTE; Marchand balun; Multiband; SAW-less; envelope-tracking; programmable gain amplifier; quadrature modulator; transmitter;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-0413-9
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2012.6242308
