Company Filing History:
Years Active: 2000
Title: Sandy Lee - Innovator in Digital Delay Lock Loop Technology
Introduction
Sandy Lee is a prominent inventor based in Sunnyvale, CA, known for her innovative contributions to digital circuitry. With a focus on enhancing the efficiency of clock signal generation, she has made significant strides in the field of electronics.
Latest Patents
Sandy Lee holds a patent for a "Frequency doubler using digital delay lock loop." This invention features a phase comparator that compares the phase of a clock signal with a generated comparison clock signal based on rising edges. The output of the phase comparator produces a series of short up (U) and down (D) pulses, which control an up/down shift register. This mechanism compensates for phase differences by inserting or removing discrete delay elements in a variable delay line. The resulting double frequency clock generator produces a 2.times. clock signal, which is then divided by 2 to supply the phase comparator with the generated comparison clock signal. This feedback scheme stabilizes the digital delay lock loop after a few clock cycles without requiring additional external control. The use of digital delay elements reduces the need for large analog circuits typically used in phase-locked loops (PLLs), saving valuable silicon space. Furthermore, the digital circuitry consumes less power than comparable analog PLLs and locks at phase quickly. The design is also less sensitive to technology types, allowing for easier transitions to future designs.
Career Highlights
Sandy Lee is currently employed at Cirrus Logic Inc., where she continues to innovate and develop cutting-edge technologies. Her work has garnered attention for its practical applications and efficiency improvements in digital circuitry.
Collaborations
Sandy has collaborated with notable colleagues, including Tony H Wu and James C Chan, contributing to a dynamic and innovative work environment.
Conclusion
Sandy Lee's contributions to digital delay lock loop technology exemplify her commitment to innovation in electronics. Her patent not only enhances the efficiency of clock signal generation but also paves the way for future advancements in digital design.