Title :
An accurate current source with on-chip self-calibration circuits for low-voltage current-mode differential drivers
Author :
Zhang, Guangbin ; Saw, Sooping ; Liu, Jin ; Sterrantino, Scott ; Johnson, David K. ; Jung, Sungyong
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas, Richardson, TX, USA
Abstract :
An accurate CMOS current source for current-mode low-voltage differential transmitter drivers has been designed and fabricated. It is composed of binary weighted current mirrors with built-in self-calibration circuits. The proposed self-measurement and calibration circuits can calibrate upon the collective effects of different error contributors due to process, power supply, and temperature variations. The design has been fabricated in standard 0.35-μm CMOS technology. Measurement results show that the differential output voltage can be self-calibrated to ±1% accuracy with 16% reference current variation, 60% power supply variation, or 13% load resistance variation, respectively.
Keywords :
CMOS analogue integrated circuits; constant current sources; current mirrors; current-mode circuits; driver circuits; low-power electronics; CMOS current source; CMOS integrated circuits; binary weighted current mirrors; built-in self-calibration circuits; built-in self-measurement; current-mode differential drivers; differential transmitter drivers; load resistance variation; on-chip self-calibration circuits; power supply variation; reference current variation; CMOS technology; Calibration; Current measurement; Driver circuits; Electrical resistance measurement; Mirrors; Power measurement; Power supplies; Temperature; Transmitters; Built-in self-measurement; CMOS integrated circuits; current-mode transmitter driver; low-voltage; self-calibration;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2005.855726
