Title :
OTACAD: An opamp synthesis tool based on simulation and lookup table
Author :
Yang, Chang-Yi ; Zhao, Xiao-Xiao ; Li, Fu-Le ; Wang, Zhi-Hua
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
A systematic methodology for opamp synthesis is presented. Based on this methodology, an automatic computer-aided design (CAD) tool called OTACAD is developed. OTACAD directly uses HSPICE as the simulator and a lookup table to model MOSFET in saturation region without complex equations. So it can design opamps in deep-sub-micron technologies and is suitable for various CMOS processes. Then, A sample opamp is designed by this tool in a 0.13-um CMOS process and used in the first stage of a 12-bit 200MS/s pipeline ADC. This ADC achieves a SNDR of 74.9dB, a SFDR of 93.0dB for a 84.2MHz input signal. In addition, several different CMOS processes have been tested to verify its adaptability.
Keywords :
CAD; CMOS integrated circuits; MOSFET; SPICE; operational amplifiers; table lookup; CMOS process; HSPICE; MOSFET; OTACAD; automatic computer-aided design tool; deep-submicron technologies; frequency 84.2 MHz; lookup table; opamp synthesis tool; operational amplifier; pipeline ADC; size 0.13 mum; CMOS process; Design automation; Mathematical model; Measurement; Solid modeling; Table lookup; Topology;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667430
