Company Filing History:
Years Active: 2017
Title: Zhiwei Wu: Innovator in Power Amplifier Technology
Introduction
Zhiwei Wu is a prominent inventor based in Hong Kong, CN. He has made significant contributions to the field of power amplifier technology. His innovative work focuses on enhancing the performance of switch-mode power amplifiers.
Latest Patents
Zhiwei Wu holds a patent for a "Harmonics suppression circuit for a switch-mode power amplifier." This invention addresses the issue of even harmonics in power amplifiers. The circuit utilizes a harmonics-reducing bias generator that drives bias voltages to cascode control transistors in series with driver transistors. A first bias voltage is generated by mirroring pull-up currents in the power amplifier. The design includes a p-channel source transistor and a p-channel cascode current-mirror transistor that mirror the power amplifier pull-up current to a midpoint node. Additionally, an n-channel sink transistor and an n-channel cascode current-mirror transistor mirror the pull-down current to the midpoint node. An operational amplifier compares the midpoint node to VDD/2 and drives the gate of a p-channel feedback transistor. Current from this feedback transistor flows through an n-channel cascode current-mirror transistor, generating a second bias voltage. This second bias voltage is adjusted until the midpoint node reaches VDD/2, which helps to better match the pull-up and pull-down currents in the power amplifier, ultimately reducing even harmonics. Zhiwei Wu has 1 patent to his name.
Career Highlights
Zhiwei Wu is associated with the Hong Kong Applied Science and Technology Research Institute Company, Limited. His work at this institution has allowed him to focus on cutting-edge research and development in the field of electronics and power systems.
Collaborations
Zhiwei Wu collaborates with fellow researcher Shiyuan Zheng. Their partnership has contributed to advancements in their respective fields.
Conclusion
Zhiwei Wu is a notable inventor whose work in harmonics suppression circuits has the potential to significantly improve power amplifier performance. His contributions to technology continue to influence the industry positively.