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

fYear

2012

fDate

17-19 June 2012

Firstpage

399

Lastpage

402

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE

Conference_Location

Montreal, QC

ISSN

1529-2517

Print_ISBN

978-1-4673-0413-9

Electronic_ISBN

1529-2517

Type

conf

DOI

10.1109/RFIC.2012.6242308

Filename

6242308