Lowe Hauptman & Ham, LLP
Short current-free effective capacitance test circuit and method
A method of determining an effective capacitance of a ring oscillator free of short current. The method comprises determining a frequency of an oscillator signal communicated from a ring oscillator to an inverter via a first communication path. The first communication path has connectivity to a first voltage source, a ground path and the inverter. The first communication path is divided into a second communication path and a third communication path. The method further comprises determining a voltage line current. The method additionally comprises determining an effective capacitance of the ring oscillator based on a first voltage of the first voltage source, the voltage line current and the frequency of the oscillator signal communicated to the inverter along the third communication path.
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
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Chung-Chieh Chung-Ting Chih-Chiang Chung-Peng
Yang Lu Chang Hsieh