Title :
A track-and-hold amplifier for 1GSps 8bit ADC in 0.18 µm CMOS process
Author :
Yi Zhang ; Qiao Meng ; Qing Huang ; Kai Tang
Author_Institution :
Inst. of RF- & OE-ICs, Southeast Univ., Nanjing, China
Abstract :
A track-and-hold amplifier (THA) for 1GSps 8bit pipelined folding and interpolation (F&I) ADC is realized in TSMC 0.18 μm 1p6m CMOS process. The THA adopts bootstrapped switch instead of simple MOS switch. Dummy transistors and duplicated source follower are also taken to improve its performance. Post simulation results prove that the THA achieves a SNDR of 51.1dB at Nyquist sampling rate. Under a 1.8V supply, its power is 29mW. Simulation results of the F&I ADC demonstrate that the THA is suitable for the application.
Keywords :
CMOS integrated circuits; amplifiers; analogue-digital conversion; switches; 1GSps 8bit ADC; CMOS process; F&I ADC; MOS switch; Nyquist sampling rate; TSMC 0.18 μm 1p6m CMOS process; bootstrapped switch; dummy transistor; pipelined folding; pipelined interpolation; power 29 mW; size 0.18 mum; source follower; track-and-hold amplifier; voltage 1.8 V; CMOS integrated circuits; CMOS process; Layout; Linearity; Simulation; Switches; Transistors; F&I ADC; THA; bootstrapped switch; buffer;
Conference_Titel :
Advanced Technologies for Communications (ATC), 2012 International Conference on
Conference_Location :
Hanoi
Print_ISBN :
978-1-4673-4351-0
DOI :
10.1109/ATC.2012.6404217
