Amr Eissa is a prominent inventor based in La Jolla, California. He has made significant contributions to the field of digital fractional-N phase-locked loops (PLLs). With a total of 2 patents, his work focuses on enhancing the performance and efficiency of digital systems.

Latest Patents

One of Amr Eissa's latest patents is titled "DTC linearization via mismatch-noise cancellation for digital fractional-N PLLs." This invention involves a fractional-N PLL that includes a reference oscillator, a multi-modulus divider-based phase-error-to-digital converter, a digital loop filter, and a digitally controlled oscillator. The digital-to-time converter mismatch noise cancellation digital logic is positioned between the phase-error-to-digital converter and the digital loop filter. This innovation allows for partial cancellation of errors arising from digital-to-time converter component mismatches.

Another notable patent is focused on "Frequency to digital converter, asynchronous phase sampler and digitally controlled oscillator methods." This invention features a frequency to digital converter that incorporates digital feedback to an accumulator in a ring phase calculator, which simplifies implementation. The digital gain correction is applicable to dual mode ring oscillator converters and charge pump converters, providing compensation for forward path gain error. Additionally, asynchronous sampling includes correction logic to address arbitrary initial conditions. The digitally-controlled oscillator (DCO) control technique enables frequency adjustments by changing the state of one frequency control element at a time.

Career Highlights

Amr Eissa is affiliated with the University of California, where he continues to advance his research and development efforts. His work has garnered attention for its innovative approaches to digital signal processing and PLL technology.

Collaborations

Amr has collaborated with notable colleagues such as Ian Galton and Enrique Alvarez-Fontecilla. Their combined expertise has contributed to the success of various projects and patents.

Conclusion

Amr Eissa is a distinguished inventor whose work in digital fractional-N PLLs has led to significant advancements in the field. His innovative patents reflect his commitment to enhancing digital technology and signal processing.

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