Yi-Heng Liu

Title: Yi-Heng Liu: Innovator in Voltage Regulation Technology

Introduction

Yi-Heng Liu is a prominent inventor based in Taipei, Taiwan. He has made significant contributions to the field of electrical engineering, particularly in voltage regulation technology. With a total of four patents to his name, Liu's work has garnered attention for its innovative approaches to power management.

Latest Patents

Among his latest patents is a voltage divider circuit and voltage regulator. This invention provides a voltage regulator that includes a voltage divider and a power supply. The voltage divider circuit consists of a first, second, and third PMOS transistors, a first NMOS transistor, a pull-down circuit, and a switching capacitor circuit. The pull-down circuit features multiple switches controlled by a pull-down control signal. The switching capacitor circuit, managed by a first control pulse, includes a capacitor that connects to the dividing voltage for a brief period while the power supply starts up to provide the input voltage. The power supply incorporates a comparator and a power voltage switch. The comparator compares the dividing voltage with a reference voltage and outputs a corresponding comparison result. The power voltage switch is then controlled by this comparison result to provide the input voltage from a power voltage source.

Another notable invention is a comparator that comprises a current mirror, a differential input pair, and an auxiliary circuit. The current mirror has a biasing end connected to a power voltage, a first end, and a current outputting end linked to the output node of the comparator. The differential input pair has first and second input ends for receiving a first voltage and a second voltage, along with a second and third end, and a ground end. The auxiliary circuit connects between the output node and the second end, providing a minimum voltage of a comparison result output at the output node. The comparison result is the power voltage when the first voltage exceeds the second voltage, and it is the minimum voltage when the first voltage is less than the second voltage.

Career Highlights

Yi-Heng Liu is currently employed at Elite Semiconductor Memory Technology, Inc., where he continues to develop innovative solutions in semiconductor technology. His work has been instrumental in advancing the efficiency and reliability of voltage regulation systems.

Collaborations

Liu collaborates with Dar-Woei Wang, a fellow innovator in the field. Their partnership has led to the development of cutting-edge technologies that enhance power management systems.

Conclusion