Horng-Der Chang

Title: Horng-Der Chang: Innovator in Audio and Impedance Matching Technologies

Introduction

Horng-Der Chang is a prominent inventor based in Hualien, Taiwan. He has made significant contributions to the fields of audio processing and impedance matching circuits. With a total of 10 patents to his name, Chang's work has had a notable impact on technology and innovation.

Latest Patents

One of his latest inventions is an impedance matching circuit designed to facilitate impedance matching between the characteristic impedance of a cable and the input impedance at the input terminal of a receiver for data transmission. This circuit includes a first transistor, a second transistor, a resistor, a negative feedback control circuit, a multiplexer, and a reference voltage generator. The circuit is capable of adjusting the reference voltage to maintain equivalent resistance, even when the characteristic impedance of the cable varies.

Another significant patent is an audio processing circuit and method. This circuit comprises a clock synthesizer, a clock divider, a digital interpolator module, a sampling rate converter, and a digital-to-analog converter. The clock synthesizer generates a base clock signal based on a sampling clock signal and a first reference clock signal. The digital interpolator module processes digital audio data according to the multiple frequency clock signal, ultimately converting it into an analog audio signal.

Career Highlights

Horng-Der Chang has worked with notable companies in the technology sector, including Realtek Semiconductor Inc. and Mstar Semiconductor, Inc. His experience in these organizations has contributed to his expertise and innovative capabilities in the field.

Collaborations

Some of his coworkers include Chao-Cheng Lee and Sterling Smith. Their collaboration has likely fostered an environment of creativity and innovation, leading to the development of impactful technologies.

Conclusion

Horng-Der Chang's contributions to impedance matching and audio processing technologies highlight his role as a significant inventor in the tech industry. His patents reflect a commitment to advancing technology and improving data transmission and audio quality.