טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentSotman Michael
SubjectIssues in Analysis and Design of Power Delivery Structures
in VLSI
DepartmentDepartment of Electrical Engineering
Supervisor Professor Emeritus Avinoam Kolodny
Full Thesis textFull thesis text - English Version


Abstract

With rising clock frequencies, power supply distribution networks on silicon chips require on-die decoupling capacitors. Symbiotic decoupling capacitors are intrinsic capacitors within idle circuits on the die. If the symbiotic capacitances are insufficient, intentional decoupling capacitors must be added for this purpose. The nature of symbiotic decoupling capacitance in modern VLSI components is explored and its magnitude is estimated. Intentional capacitance requirement is evaluated based on current consumption and the voltage noise design target.  Analysis of the effective decoupling radius around a switching gate leads to a solution of a distributed model of the power delivery network. The solution is performed in the frequency domain, and provides the dependence of the decoupling activity radius on frequency. Based on this solution, design considerations and guidelines are presented for determining the appropriate density of on-die decoupling capacitances and required power grid parameters, depending upon the density and the frequency characteristics of the switching activity in the circuit.