Title :
Ultra low power flash ADC for UWB transceiver applications
Author :
Masoumi, Mohammad ; Markert, Erik ; Heinkel, Ulrich ; Gielen, Georges
Author_Institution :
Chair Circuit & Syst. Design, Tech. Univ. Chemnitz, Chemnitz, Germany
Abstract :
In this paper a low power, 4-bit, 50 MHz flash ADC in 130 nm technology is presented. Power consumption is the most important objective in this ADC. Two blocks, S/H and Latch, can be omitted in this ADC because of the comparator and encoder structures. Flash ADC has a peak SNDR of 23.47 dB at Nyquist frequency while the power consumption is 130 muW with a binary code encoder. This reduces to 115 muW if output data are in Gray code. The proposed ADC achieves 0.1625 pJ per conversion-step if the output is binary.
Keywords :
Gray codes; Nyquist criterion; analogue-digital conversion; binary codes; comparators (circuits); low-power electronics; nanoelectronics; transceivers; ultra wideband communication; Gray code; Nyquist frequency; UWB transceiver; binary code encoder; comparator structure; noise figure 23.47 dB; power 130 muW; size 130 nm; ultra low power flash ADC; Capacitance; Charge transfer; Circuit noise; Energy consumption; Feedback circuits; Frequency; Latches; Resistors; Transceivers; Voltage; A/D Converter; Kickback noise; Resistor ladder; comparator; encoder;
Conference_Titel :
Circuit Theory and Design, 2009. ECCTD 2009. European Conference on
Conference_Location :
Antalya
Print_ISBN :
978-1-4244-3896-9
Electronic_ISBN :
978-1-4244-3896-9
DOI :
10.1109/ECCTD.2009.5275135
