Title :
0.13 μm CMOS Cartesian loop transmitter IC with fast calibration and switching scheme from opened to closed loop
Author :
Otaka, Shoji ; Hosoya, Masahiro ; Ishihara, Hiroaki ; Hashimoto, Toru ; Araki, Yuta
Author_Institution :
Corp. R&D Center, Toshiba Corp., Kawasaki
Abstract :
A 0.13 mum CMOS Cartesian loop transmitter IC with calibration and loop setting scheme of less than 5 mus is fabricated in order to keep high efficiency in wide output power range. The proposed scheme adjusts amplitude, phase, loop gain by using TX modulated signal for fast loop setting. Adjacent channel power leakage ratio (ACPR) is improved by 18 dB. The transmitter IC without PA consumes 62 mA, in which feedback path consumes 22 mA.
Keywords :
CMOS integrated circuits; calibration; transmitters; CMOS Cartesian loop transmitter IC; adjacent channel power leakage ratio; calibration; current 22 mA; current 62 mA; loop setting scheme; size 0.13 mum; switching scheme; CMOS integrated circuits; Calibration; Feedback loop; Gain; Multiaccess communication; Output feedback; Phase detection; Power generation; Switches; Transmitters;
Conference_Titel :
Solid-State Circuits Conference, 2008. ESSCIRC 2008. 34th European
Conference_Location :
Edinburgh
Print_ISBN :
978-1-4244-2361-3
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2008.4681862
