Title :
100-MS/s 14-b track-and-hold amplifier in 0.18-μm CMOS
Author :
Vecchi, Davide ; Azzolini, Cristiano ; Boni, Andrea ; Chaahoub, Faouzi ; Crespi, Lorenzo
Author_Institution :
Dip. Ing. Inf., Parma Univ., Italy
Abstract :
The paper describes the design and the implementation of a track-and-hold (THA) amplifier suitable for a 14-b, 100 MS/s A/D converter, in 0.18 μm CMOS technology. The THA is based on the flip-around architecture with telescopic cascode OTA. Adequate settling behavior was achieved by means of accurate analysis and design of the boosting amplifier with respect to its impact on the pole-zero placement. A modified bootstrap switch featuring a high linearity and reduced complexity is also presented.
Keywords :
CMOS integrated circuits; analogue-digital conversion; bootstrap circuits; operational amplifiers; poles and zeros; sample and hold circuits; 0.18 micron; 14 bit; A-D converter; CMOS technology; boosting amplifier; flip-around architecture; modified bootstrap switch; pole-zero placement; telescopic cascode OTA; track-and-hold amplifier; Boosting; Capacitors; Energy consumption; Frequency; Mirrors; Sampling methods; Switches; Tail; Transfer functions; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European
Print_ISBN :
0-7803-9205-1
DOI :
10.1109/ESSCIR.2005.1541609
