Hua Zhu

Title: The Innovations of Hua Zhu

Introduction

Hua Zhu is a notable inventor based in San Jose, CA, with a remarkable portfolio of inventions. He holds 5 patents that showcase his expertise in electrical engineering and power supply technologies. His contributions have significantly impacted the field of low-dropout regulators and switch mode power supplies.

Latest Patents

One of Hua Zhu's latest patents is titled "Integrated user programmable slew-rate controlled soft-start for LDO." This invention discloses an integrated user programmable slew-rate controlled soft-start for a low-dropout regulator. It includes a current steering stage and an integrator stage, where the current steering stage may also be denoted as an error amplifier. A Miller compensation capacitor couples between an input node to the integrator stage and an output node for the output voltage of the LDO. During the power-up period of the LDO, the current steering stage generates an input current that charges the Miller compensation capacitor. This controlled charging of the Miller compensation capacitor regulates the slew rate of the output voltage as it rises to its regulated value upon completion of the power-up period.

Another significant patent is "Switch mode power supply with ramp generator for wide frequency range pulse width modulator or the like." This invention describes a switch mode power supply that includes an error amplifier, an oscillator, a pulse width modulation logic circuit, and an output stage. The oscillator features a current generator that receives a clock signal and provides a current proportional to the frequency of the clock signal. A current mirror is coupled to the output of the current generator, and a first capacitor provides a ramp signal. The pulse width modulation logic circuit compares the output of the error amplifier with the ramp signal, generating high- and low-side drive signals in response to the comparison. The output stage is responsive to these drive signals for alternatively coupling a switch terminal between an input voltage terminal and ground.

Career Highlights

Hua Zhu has worked with prominent companies such as Fairchild Semiconductor Corporation and Intel Corporation. His experience in these organizations has allowed him to develop innovative solutions and contribute to advancements in technology.

Collaborations

Hua Zhu has collaborated with talented individuals in the industry, including Kaiwei Yao and Tim Swettlen. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Hua Zhu's contributions to the