Zhiqin Chen

This inventor holds 33 USPTO granted patents and 6 published patent applications and 12 EPO patents, primarily in Voltage-Controlled Oscillators. Top assignee: Qualcomm Incorporated. Active years: 2009-2026.

USPTO Granted Patents = 33 (Patent Applications = 6)

% Patents Active = 81.8

EPO Patents = 12 (Patent Applications = 19)

Average Co-Inventor Count = 2.9

ph-index = 6

Forward Citations = 145(Granted Patents)

Company Filing History:

33 out of 44,831

Qualcomm Incorporated

patents

Years Active: 2009-2026

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Areas of Expertise:

Inductor-Capacitor

Phase Locked Loop

Harmonic Filter

High-Speed Sampler

Variable Gain Amplifier

Fractional Phase Locked Loop

Clock Generation

Low-Power Amplifier

Memory Access Time

PWM Decoder

Self Reset Clock Buffer

Timing Margin

33 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12633874 - Switchable active element for inductor-capacitor (LC) voltage controlled oscillator (2026-05-19),

2. 12526009 - Phase locked loop with decreased recovery time from disabling spread spectrum clock (2026-01-13),

3. 12463588 - Phase noise reduction for voltage-controlled oscillator using harmonic filter (2025-11-04),

4. 12388692 - Hybrid clocking scheme for SERDES physical layer circuits (2025-08-12),

5. 12368441 - Power supply calibration for voltage controlled oscillators (2025-07-22),

6. 12255661 - Early lock detection for phase locked loops (2025-03-18),

7. 12009811 - High-speed sampler (2024-06-11),

8. 11863356 - Analog receiver front-end with variable gain amplifier embedded in an equalizer structure (2024-01-02),

9. 11764795 - Fractional phase locked loop (PLL) with digital control driven by clock with higher frequency than PLL feedback signal (2023-09-19),

10. 11711077 - High-speed sampler (2023-07-25),

11. 11329639 - Delay cell for quadrature clock generation with insensitivity to PVT variation and equal rising/falling edges (2022-05-10),

12. 10698439 - Efficient clock forwarding scheme (2020-06-30),

13. 9755817 - Compact phase interpolator (2017-09-05),

14. 9497049 - Wideband transmitter with high-frequency signal peaking (2016-11-15),

15. 9485084 - Linearity of phase interpolators by combining current coding and size coding (2016-11-01),

Title: **The Innovative Journey of Zhiqin Chen**

Introduction

Zhiqin Chen is a prominent inventor based in San Diego, California. With a remarkable portfolio of 27 patents to his name, he has made significant contributions to the field of electronics, particularly in communication technologies.

Latest Patents

Among his latest innovations is a **High-speed sampler** which features a regeneration circuit incorporating various transistors and switches designed to optimize signal processing. This sophisticated design aims to enhance the performance of electronic devices by improving their sampling capabilities. Another notable patent is the **Analog receiver front-end with variable gain amplifier embedded in an equalizer structure**. This invention employs a first equalizer circuit with a trans-impedance amplifier, further enhancing the function of the receiving circuit through an embedded variable gain amplifier controlled by feedback resistors.

Career Highlights

Zhiqin Chen currently works at Qualcomm Incorporated, a leader in semiconductor and telecommunications equipment. His work at Qualcomm has placed him at the forefront of innovations in high-speed communication systems, allowing him to leverage cutting-edge technology to develop and refine his groundbreaking ideas.

Collaborations

Throughout his career, Zhiqin has collaborated with talented colleagues such as Nan Chen and Chang Ho Jung. These partnerships have not only enriched his research but also paved the way for shared advancements in patentable inventions, contributing to the dynamic field of electronics.

Conclusion

Zhiqin Chen’s contributions through his numerous patents highlight the significant impact of innovation in technology. As he continues to push the boundaries of electronic design at Qualcomm, his work serves as an inspiration to aspiring inventors and innovators in the industry.