Published: October 25, 2026
In the high-stakes world of semiconductor manufacturing, the engineering bench is typically where hardware designers spend their careers. Developing custom integrated circuits (ICs) requires precise simulation, floorplanning, and layout verification before sending masks off to the foundry. However, translating complex silicon architectures into relatable concepts for external audiences has become an equally vital discipline for modern hardware engineers.
For Preethi Ashwath, an integrated circuit designer in the consumer electronics group at Analog Devices, the path toward microelectronics began with early exposure to physical science and systems engineering in Bengaluru, India. Pursuing her undergraduate degree at the SJB Institute of Technology, she aimed to enter the microelectronics sector. Her graduate studies in electrical engineering at the University of California, Irvine, further narrowed her focus onto transistor-level circuit behavior.
From Academic Spark to Semiconductor Engineering
Her practical engineering foundation took shape during a pivotal internship at Intel in Santa Clara, California. Immersed in chip layout, packaging constraints, and EDA reliability tools such as Ansys Totem, she observed the complete product development lifecycle. The cycle of defining target parameters, engineering mixed-signal blocks, running extensive SPICE simulations, and verifying physical silicon after tape-out fostered a deep passion for custom circuit architecture.
Mastering Electrostatic Discharge (ESD) Protection Design
At Analog Devices, Ashwath specializes in a critical yet frequently underappreciated aspect of microchip design: Electrostatic Discharge (ESD) protection networks. As integrated circuits scale down to sub-micron nodes and operate across multiple internal voltage domains, protecting delicate gate oxide layers and thin copper interconnects from voltage transients becomes exceptionally challenging.
Her core responsibilities include designing pad rings—the peripheral protective architectures constructed around the outer boundary of a semiconductor die. A misplaced ESD clamp or an improperly sized diode path can allow transient discharge to rupture thin oxides or create latent microscopic defects. These hidden flaws may bypass initial automated test equipment (ATE) screeners only to cause catastrophic field failures months down the line.
Designing effective ESD infrastructure demands a dual understanding of semiconductor device physics and chip-level power routing. Ashwath works closely with layout engineers, system architects, and digital logic teams to construct robust clamp structures, guard rings, and low-impedance discharge routes without introducing excessive parasitic capacitance or excessive leakage current into high-frequency signal paths.
Conquering the Noise Floor in Wearable Health Platforms
While much of her effort focuses on physical silicon safety and mixed-signal building blocks, Ashwath's work directly powers next-generation wearable and hearable devices. Modern consumer earbuds are evolving beyond basic acoustic transducers into sophisticated physiological diagnostic nodes capable of non-invasively tracking vital metrics through acoustic and mechanical vibrations in the ear canal.
Designing analog front-ends (AFEs) for these applications presents significant hardware obstacles. The bio-signals corresponding to minute cardiac or pulmonary movements are extraordinarily tiny, easily swallowed by motion artifacts, muscle activity, and ambient acoustic interference. Extracting a reliable signal requires high-dynamic-range low-noise amplifiers (LNAs), low-drift instrumentation architecture, and precise analog filtering prior to analog-to-digital conversion. At its core, isolating sub-millivolt physiological signals out of environmental noise is an analog-domain challenge that cannot be solved by digital processing alone.
Stepping onto the Global Stage
Engineers often remain behind the scenes during product launches, but Ashwath transitioned into a prominent technical spokesperson role for her team. At the Consumer Electronics Show (CES) in Las Vegas, she presented smart earbud reference designs capable of detecting physiological anomalies, explaining complex mixed-signal concepts to press, customers, and industry peers alike.
Her outreach efforts expanded to other specialized domains. At the National Association of Music Merchants (NAMM) trade show, she demonstrated the Automotive Audio Bus (A2B) technology—a low-latency digital audio transport system capable of distributing multi-channel audio, control data, clock synchronization, and power over single unshielded twisted-pair (UTP) cabling. Furthermore, at internal technical symposia, she spearheaded demonstrations centered on power management and sensor interface architectures for augmented reality (AR) smart glasses.
Bridging Industry Implementations and Academic Research
Continuous technical growth in the semiconductor industry demands remaining connected to foundational research. Ashwath maintains an active role within the IEEE Circuits and Systems Society (CASS), volunteering as a peer reviewer for prestigious conferences such as the IEEE International Symposium on Circuits and Systems (ISCAS) and the Midwest Symposium on Circuits and Systems (MWSCAS).
By reviewing cutting-edge academic submissions, practicing engineers help uphold rigorous standards while gaining early insight into emerging topologies, novel device structures, and advanced design techniques. This peer-review process creates a dynamic feedback loop between academic innovation and commercial silicon execution, ensuring that state-of-the-art research translates into robust, mass-production-ready hardware solutions.
The Circuit Designer’s Perspective
For mixed-signal engineers, the ultimate validation comes when physical measurements on bench test equipment align perfectly with pre-silicon post-layout simulations. Crossing the boundary from individual functional blocks to finished consumer electronics that enrich daily life underscores the balance of patience, analytical precision, and creative problem-solving native to integrated circuit design.
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Original news rewritten with AI for educational purposes.
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