Method and apparatus for accurately determining the crossing point within a logic transition of a differential signal
AssigneeIntel Corporation
InventorGregory L. Ebert
Life of this patent
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Abstract
A method is described that involves forming a product waveform by multiplying a positive signal waveform and negative signal waveform. The positive signal waveform and the negative signal waveform are representative of a logical transition within a differential signal. The crossing point voltage of the logical transition within the differential signal is determined by calculating the square root of a maximum of the product waveform.
Claims49
A method, comprising:
- a) forming a product waveform by multiplying a positive signal waveform and negative signal waveform, said positive signal waveform and said negative signal waveform being representative of a logical transition within a differential signal;
- and
- b) determining the crossing point voltage of said logical transition within said differential signal by calculating the square root of a maximum of said product waveform.
A method, comprising:
- determining the highest crossing point reached by a plurality of logical transitions within a differential signal by calculating the square root of the maximum height reached by a plurality of product waveforms, wherein each of said logical transitions has a corresponding product waveform, wherein each of said product waveforms is a product of a positive signal waveform and a negative signal waveform that represent its corresponding logical transition.
A method, comprising:
- determining the lowest crossing point reached by a plurality of logical transitions within a differential signal by calculating the square root of the maximum height reached by a plurality of product waveforms, wherein each of said logical transitions has a corresponding product waveform, wherein each of said product waveforms is a product of a positive signal waveform and a negative signal waveform that represent its corresponding logical transition.
A machine readable medium having stored thereon sequences of instructions which are executable by a digital processing system, and which, when executed by the digital processing system, cause the system to perform a method comprising:
- a) forming a product waveform by multiplying a positive signal waveform and negative signal waveform, said positive signal waveform and said negative signal waveform being representative of a logical transition within a differential signal;
- and
- b) determining the crossing point voltage of said logical transition within said differential signal by calculating the square root of a maximum of said product waveform.
A machine readable medium having stored thereon sequences of instructions which are executable by a digital processing system, and which, when executed by the digital processing system, cause the system to perform a method comprising:
- determining the highest crossing point reached by a plurality of logical transitions within a differential signal by calculating the square root of the maximum height reached by a plurality of product waveforms, wherein each of said logical transitions has a corresponding product waveform, wherein each of said product waveforms is a product of a positive signal waveform and a negative signal waveform that represent its corresponding logical transition.
A machine readable medium having stored thereon sequences of instructions which are executable by a digital processing system, and which, when executed by the digital processing system, cause the system to perform a method comprising:
- determining the lowest crossing point reached by a plurality of logical transitions within a differential signal by calculating the square root of the maximum height reached by a plurality of product waveforms, wherein each of said logical transitions has a corresponding product waveform, wherein each of said product waveforms is a product of a positive signal waveform and a negative signal waveform that represent its corresponding logical transition.
Dependencies are inferred from the claim text.