Tzu-Chao Lin

Title: Tzu-Chao Lin: Innovator in Phase Locked Loop Technology

Introduction

Tzu-Chao Lin is a prominent inventor based in Kaohsiung, Taiwan. He has made significant contributions to the field of electronics, particularly in the development of phase locked loop (PLL) technology. With a total of 3 patents to his name, Lin's work has had a notable impact on the industry.

Latest Patents

One of Lin's latest patents is a phase locked loop with phase shifted input. In this invention, phase shifters adjust the phase of an input signal. Based on the phases of the input signal, the shifted signals, and a frequency division output signal, phase frequency detectors (PFDs) generate phase difference signals. In response to these signals, charge pumps (CPs) control the output voltages. The output voltages of the CPs allow a voltage controlled oscillator (VCO) to produce an output signal. A frequency divider then divides the frequency of this output signal to generate the frequency division output signal, which is sent to one of the PFDs at the appropriate timing. Additionally, a modulator is included to reduce quantization errors of the frequency divider.

Another notable patent is a sub-harmonic mixer and down converter that incorporates the same technology. This invention features a differential amplifying unit, a current buffer unit, and a switching unit. The differential amplifying unit amplifies a radio frequency (RF) signal and uses a first resonance circuit to direct a leakage signal to a first voltage. The current buffer unit enhances the gain of the output signal from the differential amplifying unit and employs a second resonance circuit to guide the leakage signal to a second voltage. Finally, the switching unit converts the output signal of the current buffer unit into a base band signal.

Career Highlights

Tzu-Chao Lin has worked with notable organizations such as United Microelectronics Corporation and National Taiwan University. His experience in these institutions has allowed him to refine his skills and contribute to various innovative projects.

Collaborations

Throughout his career, Lin has collaborated with talented individuals, including Jen-Chung Chang and Chia-Jung Hsu. These partnerships have fostered a creative environment that has led to significant advancements in technology.

Conclusion

Tzu-Chao Lin is a distinguished inventor whose work in phase locked loop technology