Title :
A 6-bit low power flash ADC with a novel bubble error correction used in UWB communication systems
Author :
Sheng Zhang ; Shuo Wang ; Xiaokang Lin ; Guanjing Ren
Author_Institution :
Shenzhen Grad. Sch., Tsinghua Univ., Shenzhen, China
Abstract :
In this paper, we propose a 6-bit flash ADC for Ultra-wideband communication (UWB) systems. This ADC has been fabricated in SMIC 0.18μm CMOS process. With an evolved differential preamplifier and comparator, the designed ADC achieved a high sampling rate of 1Gsps and 1.4GHz bandwidth. In addition, a novel bubble error correction (BEC) is proposed in this design and improves the accuracy effectively. The measurement results show the maximum INL and DNL of the proposed ADC are +0.48LSB/-0.36LSB and +0.67LSB/-0.25LSB, respectively, and the SFDR performance is over 39dB at 600Msps. Limited by the test environment, the ADC was test below 800MHz instead of 1GHz. Powered with a single 1.8V power supply, the power consumption of the ADC core is about 98mW and the FoM is only 0.76pJ/step*Hz. The proposed ADC has a small core area of less than 0.5mm2.
Keywords :
UHF amplifiers; analogue-digital conversion; error correction; field effect MMIC; low-power electronics; ultra wideband communication; CMOS process; UWB communication systems; bubble error correction; comparator circuit; differential preamplifier; frequency 1.4 GHz; low power flash ADC; power 98 mW; size 0.18 mum; ultrawideband communication systems; Accuracy; Bandwidth; CMOS integrated circuits; Error correction; Fluids; Power demand; Ultra wideband communication; 6-Bit Flash ADC; Bubble error correction; High Power Efficiency; UWB Communication System;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2014 IEEE International Conference on
DOI :
10.1109/EDSSC.2014.7061168
