Ma Jian-Guo

Title: The Innovations of Ma Jian-Guo

Introduction

Ma Jian-Guo is a notable inventor based in Singapore, recognized for his contributions to the field of electronics. He holds a patent for a wide-band/multi-band voltage controlled oscillator, which is a significant advancement in signal generation technology. His work has implications for various applications in telecommunications and electronic devices.

Latest Patents

Ma Jian-Guo's patent, titled "Wide-band/multi-band voltage controlled oscillator," describes a variable frequency signal generator that provides wide-band and/or multi-band output frequency operation using two control voltage inputs. The invention features a pair of LC oscillator circuits that are cross-coupled through a transconductance control circuit. These oscillator circuits deliver quadrature output frequency signals and include MOSFET varactors that can be controlled by a first control voltage. This allows the varactors to operate in inversion or depletion modes, corresponding to different output signal frequency bands. A second control voltage is utilized to manage the currents injected from each oscillator to the other, enabling the selection of a specific output frequency within the determined frequency band. The design also incorporates a control voltage compensation circuit to maintain frequency band stability. The output signals can achieve frequencies ranging from 850 MHz to 2.4 GHz, characterized by favorable harmonic content and low phase noise, all while operating at relatively low supply voltages.

Career Highlights

Ma Jian-Guo is currently employed at Chartered Semiconductor Manufacturing Ltd, a corporation known for its expertise in semiconductor technology. His role at the company has allowed him to further develop his innovative ideas and contribute to advancements in the industry.

Collaborations

Throughout his career, Ma Jian-Guo has collaborated with talented individuals, including Yeo Kiat Seng and Chew Kok Wai. These collaborations have fostered a creative environment that encourages the exchange of ideas and the development of cutting-edge technologies.

Conclusion

Ma Jian-Guo's contributions to the field of electronics, particularly through his patented voltage controlled oscillator, highlight his innovative spirit and dedication to advancing technology. His work continues to influence the industry and pave the way for future developments in signal generation.