Title :
A dynamic CMOS comparator with high precision and resolution
Author :
Wu Rang ; Xiaobo, Wu ; Xiaolang, Yan
Author_Institution :
Inst. of Very Large Scale Integrated Circuit Design, Zhejiang Univ., China
Abstract :
High precision dynamic comparator is of key importance to some mixed signal circuits like SAR A/D converter. By using a dynamic positive feedback latch, a CMOS comparator has been proposed. Simulation proved that its LSB (least significant bit) is 0.015mV, the dynamic input range covers near the whole supply voltage and the power dissipation is 6.28mW. It has been applied to a new SAR CMOS A/D converter with high resolution of 14-bit and operating frequency of 3.6MHz. Its reliability and applicability were proven by corner simulation.
Keywords :
CMOS integrated circuits; analogue-digital conversion; comparators (circuits); -40 to 100 C; 122 dB; 188 micron; 3.6 MHz; 4.5 to 5.5 V; 400 micron; 6.28 mW; SAR analog-to-digital converter; dynamic CMOS comparator; dynamic input range; dynamic positive feedback latch; least significant bit; mixed signal circuit; power dissipation; Circuit simulation; Feedback; Integrated circuit synthesis; Latches; Power dissipation; Power supplies; Signal resolution; Switches; Very large scale integration; Voltage;
Conference_Titel :
Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on
Print_ISBN :
0-7803-8511-X
DOI :
10.1109/ICSICT.2004.1436918
