Company Filing History:

7 out of 2,595

Cirrus Logic Inc.

patents

3 out of 763

Conexant Systems, Inc.

patents

1 out of 1,351

Synaptics Corporation

patents

Years Active: 2011-2022

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11 patents (USPTO):Sort by Forward Citations

Abstract keywords

1. 11502671 - Digital pulse-width modulation (PWM) modulator with dynamically switchable code set for reduced total harmonic distortion and noise (THDN) (2022-11-15),

2. 11296685 - PWM modulator having quantizer calibratable for multi-non-ideal gain-affecting characteristics (2022-04-05),

3. 10819328 - PWM modulator having quantizer with controllable analog gain and calibratable for multi-non-ideal gain-affecting characteristics (2020-10-27),

4. 10812074 - Control of switches in a variable impedance element (2020-10-20),

5. 10659029 - Chopped triangular wave PWM quantizer (2020-05-19),

6. 10476502 - Control of switches in a variable impedance element (2019-11-12),

7. 10476455 - Apparatus and method of suppressing transient noise during transition for class-D amplifier system having one or more pulse width modulator output paths (2019-11-12),

8. 10333506 - High-speed current comparator suitable for nano-power circuit design (2019-06-25),

9. 9276525 - Adaptive biasing technique for audio circuitry (2016-03-01),

10. 9024603 - Low power current comparator for switched mode regulator (2015-05-05),

11. 7952508 - Noise-shaped scrambler for reduced out-of-band common-mode interference (2011-05-31),

Title: Innovations of Kyehyung Lee

Introduction

Kyehyung Lee is a prominent inventor based in Austin, TX, known for his significant contributions to the field of digital signal processing. With a total of 11 patents to his name, Lee has made remarkable advancements in technologies that enhance audio quality and reduce distortion.

Latest Patents

One of his latest patents is a digital pulse-width modulation (PWM) modulator with a dynamically switchable code set designed to reduce total harmonic distortion and noise (THDN). This innovative modulator effectively modulates a digital input signal to drive a PWM signal, addressing issues related to inter-symbol interference (ISI) that can degrade audio quality. The multi-bit quantizer in this invention switches modes based on the input signal's threshold, optimizing performance at varying levels. Another notable patent involves a PWM modulator with a calibratable quantizer that adjusts analog gain based on the voltage swing range supplied to the speaker driver. This technology ensures that the combined gain of the quantizer and driver remains consistent across different operating modes, enhancing audio fidelity.

Career Highlights

Kyehyung Lee has worked with notable companies such as Cirrus Logic Inc. and Conexant Systems, Inc., where he has applied his expertise in audio technology and digital signal processing. His work has significantly impacted the development of high-quality audio systems.

Collaborations

Throughout his career, Lee has collaborated with talented individuals, including John L. Melanson and Lorenzo Crespi, contributing to various innovative projects and advancements in technology.

Conclusion

Kyehyung Lee's contributions to digital signal processing and audio technology have established him as a leading inventor in his field. His innovative patents continue to influence the industry and improve audio quality for consumers.

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