Title :
Novel self-calibrated high-speed D/A converter using trimmable current sources
Author :
Tang, Andrew T K ; Toumazou, Christofer
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
fDate :
30 May-2 Jun 1994
Abstract :
In this paper, a high-speed 14-bit D/A converter based on. Binary weighted current sources is presented. A full-scale output current of 10-20 mA allows 50Ω loads to be driven directly. Matching of small MOSFETs at the low LSB current level allows-only 5-bits accuracy. However, 14-bit accuracy is achieved by the novel architecture which uses digitally-controlled trimmable current sources and one of two self-calibration schemes to automatically adjust the current sources after power-up or when triggered by an external signal
Keywords :
calibration; constant current sources; digital-analogue conversion; 10 to 20 mA; 14 bit; 50 ohm; LSB current; MOSFETs; binary weighted trimmable current sources; digital control; high-speed D/A converter; self-calibration; Area measurement; Automatic logic units; Calibration; Educational institutions; High speed integrated circuits; Ice; MOSFETs; Signal resolution; Silicon; Switches;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409412
