Title :
A 10b 50MS/s opamp-sharing pipeline A/D with current-reuse OTAs
Author :
Chandrashekar, K. ; Bakkaloglu, B.
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
A 10 b opamp-sharing pipeline A/D using current-reuse OTAs is presented. The current-reuse OTA, with two NMOS differential inputs operating in opposite phases, facilitates opamp-sharing between consecutive stages, minimizing power consumption. Constant transistor biasing ensures no loss of settling time from power-on delays. The A/D is fabricated in a 0.18 mum CMOS process and occupies active area of 0.7 mm2. At 50 MS/s, maximum SNDR of 58 dB (ENOB = 9.3 b) is obtained with 9.2 mW analog power consumption on a 1.8 V supply.
Keywords :
CMOS integrated circuits; analogue-digital conversion; operational amplifiers; semiconductor optical amplifiers; CMOS process; NMOS differential inputs; analog power consumption; current-reuse OTA; opamp-sharing pipeline A/D; opposite phases; power 9.2 mW; voltage 1.8 V; CMOS process; Delay effects; Energy consumption; MOS devices; Pipelines;
Conference_Titel :
Custom Integrated Circuits Conference, 2009. CICC '09. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-4071-9
Electronic_ISBN :
978-1-4244-4073-3
DOI :
10.1109/CICC.2009.5280855
