Seminar Archives

A 140 GHz FMCW Radar with RF Self-Interference Cancellation

November 01, 2024 • Open Forum

Yikuan Chen

Frequency-Modulated Continuous Wave (FMCW) radar is playing an increasingly vital role in a wide range of applications. A D-band FMCW radar in CMOS is an attractive solution, as it allows finer range and velocity resolution, and greater integration with lower power consumption and cost. A key challenge in FMCW radar systems is the self-interference (SI) due to transmitter (TX) to receiver (RX) leakage, which degrades dynamic range and...

The Story of KPH, The Wireless Giant of the Pacific

12:00pm • September 20, 2024 • Open Forum

Abstract: The presentation will trace the history of one of the world's most famous Morse code coast stations from its beginning in 1905 until today, including a view of maritime radio communications over time. The presentation consists entirely of photos with a live narration provided by me.

About the Speaker I was born to radio. My earliest memories include dragging home discarded radios...

Silicon Photonic MEMS Switch for AI SuperComputers

12:00pm • September 13, 2024 • Open Forum

Abstract:

Programmable optical interconnect offers significant advantages for AI supercomputing clusters. Tens to hundreds of GPUs/TPUs/xPUs connected by optical circuit switches enable reconfiguration of network topology for specific AI workloads. It also increases machine availability, resilience, and physical isolation for multi tenants, in addition to significant reduction in capital and operation expenditures and power consumption. Recently, Google has reported the integration of optical circuit switches in their...

The Evolution, Tradeoffs and Future of Noise-Shaping SAR

November 22, 2024 • Open Forum

The Noise-Shaping SAR is a relatively new ADC architecture that combines the advantages of SAR and delta-sigma. It is particularly energy-efficient compared to delta-sigma and better suited for higher resolution compared to SAR. While the first noise-shaping SAR ADCs were limited to moderate resolution and speed, recent developments have extended the SNR to audio performance levels using high-order noise shaping. On the other hand, interleaving of noise-shaping SAR has effectively addressed the speed bottleneck. Noise-shaping SARs are also useful in...

Catalyzing Computing for Brain-Computer Interfaces

12:00pm • May 03, 2024 • Open Forum

Abstract: Neural interfaces will help treat brain disorders, augment the healthy brain, and shed light on how the brain as an organ gives rise to the mind. Delivering on this promise requires the design of computer systems that delicately balance the tight power, latency, and bandwidth trade-offs needed to decode brain activity, stimulate biological neurons, and control assistive devices most effectively.

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D-Band Transmitter and Receiver Architectures for Efficient 100+ Gb/s Communication

12:00pm • April 12, 2024 • Open Forum

Talk Abstract:

The D-Band (110-170 GHz) has gained interest for future communication systems due to the large available bandwidth which is conducive to 100+ Gb/s communication. Many publications which aim to surpass 100 Gb/s have been commonly demonstrated at higher frequencies (200+ GHz) and often implemented in bipolar processes. However, there is strong motivation to reach comparable data-rates (> 100Gb/s) at lower carrier frequencies such as D-Band, to enable efficient and low-cost implementation in CMOS processes...

The Path to Innovation: A Story Collection from a Grey-haired Engineer

12:00pm • April 19, 2024 • Open Forum

Abstract: The word “innovation” may not be very well understood by many, and more often than not, it is mistakenly mixed up with the word “invention.”. In fact, one would stop and ask, what is innovation? How is it measured, managed, and nourished? Is innovation a God-given gift, or can it be acquired? What elements lead to an innovative work? Why do five out of six startups usually fail? Though the answers to...

Advancing energy-efficient connectivity using BAW resonators

12:00pm • March 22, 2024 • Open Forum

Over the past 20+ years, IoT connectivity power consumption has reduced by 20x aided by semiconductor process scaling, enabling solutions with smaller batteries and longer product lifetimes. New challenges have emerged, however, that must be solved to ensure continued market growth and new applications. These include stringent limitations on physical size, robustness to interference in an ever...

IP Issues in Startups - What You Really Need to Know

12:00pm • April 05, 2024 • Open Forum

Abstract:

Starting a new company is both exciting and challenging. For a technology startup, one of the main components of the business that not only adds value but helps to differentiate your products and services is the company's intellectual property. But with all the work to be done at such an early stage, it is hard to know what is really needed to effectively develop and manage the company's...

Crystal-free mm-Wave Frequency Synthesis

12:00pm • March 15, 2024 • Open Forum

Filippo Svelto, Ali Ameri The development of stable mm-Wave frequency generation systems is crucial for various emerging technologies, including next-generation wireless communication, radar systems, and short coherence time applications. This work investigates the challenge of millimiter-Wave (mm-Wave) frequency generation with stable output frequencies. Conventional high-frequency phase-locked loops (...