Title :
A 210MHz 15mW Unified Vector and Transcendental Function Unit for Handield 3-D Graphics Systems
Author :
Nam, Byeong-Gyu ; Kim, Hyejung ; Yoo, Hoi-Jun
Author_Institution :
Dept. of EECS, Korea Adv. Inst. of Sci. & Technol., Daejeon
Abstract :
A low-power, area-efficient 4-way 32-bit unified vector and transcendental function unit has been developed for programmable shaders for handheld 3-D graphics systems. It adopts the logarithmic number system (LNS) at the arithmetic core for the small-size, low-power unification and single cycle throughput with maximum 4-cycle latency of various vector and transcendental functions. A novel logarithmic conversion scheme is proposed with 0.41% of maximum conversion error. A test chip is implemented by 0.18-mum CMOS technology with 91 K gates. It operates at 210 MHz and consumes 15 mW at 1.8 V.
Keywords :
CMOS integrated circuits; computer graphic equipment; low-power electronics; microprocessor chips; vectors; CMOS technology; arithmetic core; frequency 210 MHz; graphics processing units; handheld 3-D graphics systems; logarithmic conversion scheme; logarithmic number system; low-power unification; maximum conversion error; power 15 mW; programmable shaders; single cycle throughput; size 0.18 mum; test chip; transcendental function unit; unified vector; voltage 1.8 V; Arithmetic; CMOS technology; Delay; Energy consumption; Equations; Graphics; Linear approximation; Pipelines; Testing; Throughput;
Conference_Titel :
Solid-State Circuits Conference, 2006. ASSCC 2006. IEEE Asian
Conference_Location :
Hangzhou
Print_ISBN :
0-7803-9734-7
Electronic_ISBN :
0-7803-97375-5
DOI :
10.1109/ASSCC.2006.357860
