Title :
Dynamic VTH scaling scheme for active leakage power reduction
Author :
Kim, Chris H. ; Roy, Kaushik
Author_Institution :
Dept. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
We present a Dynamic VTH Scaling (DVTS) scheme to save the leakage power during active mode of the circuit. The power saving strategy of DVTS is similar to that of the Dynamic VDD Scaling (DVS) scheme, which adaptively changes the supply voltage depending on the current workload of the system. Instead of adjusting the supply voltage, DVTS controls the threshold voltage by means of body bias control, in order to reduce the leakage power. The power saving potential of DVTS and its impact on dynamic and leakage power when applied to future technologies are discussed. Pros and cons of the DVTS system are dealt with in detail. Finally, a feedback loop hardware for the DVTS which tracks the optimal VTH for a given clock frequency, is proposed. Simulation results show that 92% energy savings can be achieved with DVTS for 70 nm circuits
Keywords :
circuit feedback; circuit simulation; integrated circuit design; leakage currents; low-power electronics; voltage-controlled oscillators; 70 nm; 70 nm circuits; active leakage power reduction; active mode; body bias control; charge pump; clock frequency; dynamic VTH scaling scheme; feedback controller; feedback loop hardware; portable digital systems; power saving potential; power saving strategy; simulation results; threshold voltage control; voltage controlled oscillator; Circuits; Clocks; Dynamic voltage scaling; Feedback loop; Frequency; Hardware; Inverters; Temperature; Threshold voltage; Voltage control;
Conference_Titel :
Design, Automation and Test in Europe Conference and Exhibition, 2002. Proceedings
Conference_Location :
Paris
Print_ISBN :
0-7695-1471-5
DOI :
10.1109/DATE.2002.998265
