Oscilloscope noise floor de-embedding for high speed toggle signal measurement

US11614468B2 · kind B2 · utility

Assignee

• Intel Corporation · US

Inventors

• Liwei Zhao · Shanghai, CN
• Andrew Martwick · Folsom, US
• Michael Altmann · Folsom, US
• Michael Mirmak · Folsom, US
• Kamel Ahmad · West Sacramento, US
• Andrew Holland · St Ives, GB

Key dates

• Filing date: Jun 25, 2020
• Grant date: Mar 28, 2023
• Expiry date: Dec 18, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L1/205
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A scheme for noise floor de-embedding by identifying a link or relationship between noise floor from an oscilloscope and phase jitter impact on a toggling signal. The scheme uses phase or electrical spectrum and phase detection for noise floor recognition. The scheme de-embeds the impact from random noise and also removes deterministic noise or jitter from the oscilloscope. The scheme provides accurate jitter analysis for a circuit (e.g., clock data recovery circuit) after de-embedding noise floor for the oscilloscope.