Method for designing a decoupling circuit
AssigneeNEC Corporation
InventorsNoriaki Ando, Hitoshi Irino, Hiroshi Wabuka, Hirokazu Tohya
Life of this patent
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Abstract
A method for designing a decoupling circuit for a source line of a LSI includes the steps of determining the capacitance of the decoupling capacitor based on the electric charge necessary for one cycle operation of the LSI and the allowable fluctuation of the source voltage, and determining the inductance of the source line based on the impedance of the decoupling capacitor and the allowable minimum multiplexing ratio of the source current by the decoupling capacitor.
Claims9
A method for designing a decoupling circuit for a source line of a LSI to be disposed on a printed circuit board, the method comprising the steps of determining a capacitance of a decoupling capacitor based on electric charge necessary for driving the LSI in a specified period and an allowable voltage fluctuation of a source voltage at a source terminal of the LSI, and determining an inductance of the source line based on an impedance of the decoupling capacitor and an allowable minimum multiplexing ratio of a source current of the LSI by the decoupling capacitor.
Dependencies are inferred from the claim text.