Title :
A 300 MIPS/W RISC core processor with variable supply-voltage scheme in variable threshold-voltage CMOS
Author :
Suzuki, Kojiro ; Mita, Shinji ; Fujita, Tetsuya ; Yamane, Fumiyuki ; Sano, Fumihiko ; Chiba, Akihiko ; Watanabe, Yoshinori ; Matsuda, Koji ; Maeda, Takeo ; Kuroda, Tadahiro
Author_Institution :
Syst. ULSI Eng. Lab., Toshiba Corp., Kawasaki, Japan
Abstract :
A 300 MIPS/W RISC core processor with variable supply-voltage (VS) scheme in variable threshold-voltage CMOS (VTCMOS) is presented. Performance in MIPS/W can be improved by a factor of more than two with no modification in the RISC core except for substrate contacts for the VTCMOS. From a 3.3 V external power supply the VS scheme automatically generates minimum internal supply voltages which meet the demand on its operation frequency
Keywords :
CMOS digital integrated circuits; microprocessor chips; power supply circuits; reduced instruction set computing; timing; voltage control; 0.4 micron; 0.4 to 2.9 V; 20 to 40 MHz; 3.3 V; 300 MIPS; 40 to 140 mW; CMOS microprocessor; RISC core processor; VTCMOS; buck convertor; substrate contacts; variable supply-voltage scheme; variable threshold-voltage CMOS; Buck converters; Counting circuits; Delay effects; Detectors; Frequency; Inverters; Reduced instruction set computing; Threshold voltage; Timing; Voltage control;
Conference_Titel :
Custom Integrated Circuits Conference, 1997., Proceedings of the IEEE 1997
Conference_Location :
Santa Clara, CA
Print_ISBN :
0-7803-3669-0
DOI :
10.1109/CICC.1997.606694
