The Shaughnessy Report: Breaking Down the Language Barrier
Connect the Dots: Designing for Reality—Routing, Final Fab, and QC
Target Condition: ‘Boomer to Zoomer: Do You Copy?’
Estimated reading time: 1 minute
Insertion Loss: A Bigger Concern in High-Speed Digital
Digital pulses are made up of analog sine waves. In order to make a digital pulse, sine waves of different frequencies are added together to form the digital pulse. Each of these sine waves is a high-frequency RF wave at a specific frequency. As an example, when a 10 Gbps pulse is generated from a combination of the RF waves, the frequencies used will be approximately 5 GHz, 15 GHz, 25 GHz and 35 GHz added together. Actually there can be more, but this is a simple example of showing the adding of sine waves using the fundamental harmonic (5 GHz), 3rd harmonic (15 GHz), 5th harmonic (25 GHz) and the 7th harmonic frequency at 35 GHz.
Figure 1 shows how the digital pulse can be formed from adding these sine waves.
Share on:
More Columns from Lightning Speed Laminates
Lightning Speed Laminates: Millimeter-wave Properties and PCB Design ChallengesLightning Speed Laminates: Optimizing Thermal Management for Wireless Communication Systems
Lightning Speed Laminates: Test Vehicles for PCB Electrical Material Characterization
Lightning Speed Laminates: Optimum Thermal Stability Considerations
Lightning Speed Laminates: Thermal Management Isn’t Getting Easier
Lightning Speed Laminates: Benefits of High-Performance Hybrid Multilayer PCBs
Lightning Speed Laminates: An Overview of Copper Foils
Lightning Speed Laminates: The Importance of Circuit Features for Millimeter-Wave Applications