Title :
A two-step flash ADC for digital CMOS technology
Author :
Carreira, J.P. ; Franca, J.E.
Author_Institution :
Inst. Superior Tecnico, Lisbon, Portugal
Abstract :
This paper describes a current-mode two-step flash ADC suitable for integration on digital CMOS technology. The converter architecture comprises a low resolution flash employing high-speed current comparators, a thermometer-weighted current-mode DAC and a simple current subtractor and amplifier for generating the residue current. For a resolution of 7 bits and conversion frequency up to 50 MHz this converter was implemented on a 1.2 μm CMOS digital technology yielding a silicon area of 0.29 mm2
Keywords :
CMOS digital integrated circuits; analogue-digital conversion; current comparators; current-mode logic; 1.2 micron; 50 MHz; 7 bit; conversion frequency; converter architecture; current subtractor; current-mode ADC; digital CMOS technology; high-speed current comparators; residue current; silicon area; thermometer-weighted current-mode DAC; two-step flash ADC;
Conference_Titel :
Advanced A-D and D-A Conversion Techniques and their Applications, 1994. Second International Conference on
Conference_Location :
Cambridge
Print_ISBN :
0-85296-617-2
DOI :
10.1049/cp:19940542
