S Karen Khatamifard

Title: S Karen Khatamifard: Innovator in Digital Low-Dropout Voltage Regulators

Introduction

S Karen Khatamifard is a prominent inventor based in Los Angeles, CA. She has made significant contributions to the field of digital low-dropout voltage regulators (DLDOs). With a total of 3 patents, her work focuses on enhancing the performance and reliability of electronic devices.

Latest Patents

One of her latest patents is titled "Method and apparatus for mitigating performance degradation in digital low-dropout voltage regulators (DLDOs) caused by limit cycle oscillation (LCO) and other factors." This invention introduces a DLDO configuration that effectively mitigates performance degradation associated with LCO. The design includes a clocked comparator, an array of power transistors, a digital controller, and a clock pulsewidth reduction circuit. The digital controller generates control signals that manage the power transistors based on a preselected activation/deactivation control scheme. The clock pulsewidth reduction circuit modifies the input clock signal to produce a narrower pulsewidth, which helps reduce LCO mode and improve overall performance.

Another significant patent is also titled "Method and apparatus for mitigating performance degradation in digital low-dropout voltage regulators (DLDOs)." This invention addresses performance degradation caused by aging effects on power transistors, particularly negative bias temperature instability (NBTI)-induced aging. The apparatus features a shift register designed to activate and deactivate power transistors in a manner that evenly distributes electrical stress. This innovative approach mitigates performance degradation under various load current conditions while consuming minimal extra power and area overhead.

Career Highlights

Throughout her career, Khatamifard has worked with esteemed institutions such as the University of South Florida and the Regents of the University of Minnesota. Her expertise in the field of electrical engineering has led to advancements in voltage regulation technology.

Collaborations

Khatamifard has collaborated with notable colleagues, including Selçuk Köse and Longfei Wang. Their combined efforts have contributed to the development of innovative solutions in the realm of digital low-dropout voltage regulators.

Conclusion

S Karen Khatamifard is a trailblazer in the field of digital low-dropout voltage regulators, with a focus on enhancing performance and reliability. Her patents reflect her commitment to innovation and her impact on the industry.