Title :
Characterizing and modeling minimum energy operation for subthreshold circuits
Author :
Calhoun, Benton H. ; Chandrakasan, Anantha
Author_Institution :
MIT, Cambridge, MA, USA
Abstract :
Subthreshold operation is emerging as an energy-saving approach to many new applications. This paper examines energy minimization for circuits operating in the subthreshold region. We show the dependence of the optimum VDD for a given technology on design characteristics and operating conditions. Solving equations for total energy provides an analytical solution for the Optimum VDD and VT to minimize energy for a given frequency in subthreshold operation. SPICE simulations of a 200K transistor FIR filter confirm the analytical solution and the dependence of the minimum energy operating point on important parameters.
Keywords :
CMOS logic circuits; FIR filters; SPICE; VLSI; integrated circuit design; integrated circuit modelling; leakage currents; low-power electronics; threshold logic; FIR filter; SPICE simulation; design characteristics; energy minimization; energy-saving approach; gate leakage; minimum energy operation; operating conditions; subthreshold circuits; subthreshold model; transregional model; Analytical models; Circuit simulation; Equations; Finite impulse response filter; Frequency; Gate leakage; Minimization; Permission; SPICE; Threshold voltage;
Conference_Titel :
Low Power Electronics and Design, 2004. ISLPED '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
1-58113-929-2
DOI :
10.1109/LPE.2004.1349316
