Mau Chung Chang

Title: The Innovations of Mau Chung Chang

Introduction

Mau Chung Chang is a notable inventor based in Thousand Oaks, California, with a remarkable portfolio of nine patents. His work primarily focuses on advancements in micro-electromechanical systems (MEMS) and integrated transceiver technologies.

Latest Patents

One of his latest patents is a frequency synthesizer using micro-electromechanical systems (MEMS). This invention features a frequency stabilizer circuit in the form of a charge-pump phase-lock loop that utilizes a MEMS capacitance device. This device, preferably a tunable MEMS capacitor or a MEMS capacitor bank, allows for rapid and precise determination of the phase and frequency of a carrier signal. This capability enables the extraction of an information signal of interest. The MEMS devices offer advantages such as linear capacitance, low insertion losses, higher isolation, and high reliability, all while operating on low power. This innovation permits the entire circuit to be fabricated on a common substrate, reducing unwanted harmonics generated by the circuit's charge pump and potentially relaxing or eliminating filtering requirements.

Another significant patent is the integrated passive transceiver section. In this invention, the passive components of a transceiver, including transmit/receive switches, antennas, inductors, capacitors, and resonators, are integrated on a common substrate. This integration results in a highly reliable, low-cost, high-performance transceiver. The use of micro-electromechanical device fabrication techniques ensures low-loss, high-performance switches and reactive components, enabling a high level of integration. The passive components are preferably integrated on a low-cost glass substrate, while transceiver circuits containing active components are fabricated on a separate substrate. This design allows for the optimization of performance through additional MEM switching devices that permit multiple, parallel signal paths to be switched in and out of the transceiver circuitry as needed.

Career Highlights

Mau Chung Chang has had a distinguished career, working with prominent organizations such as Rockwell Science Center, Inc. and Rockwell International Corporation. His contributions to the field of MEMS and transceiver technology have significantly impacted the industry.

Collaborations

Throughout his career, Chang has collaborated with notable individuals, including David R. Pehlke and James L. Bartlett. Their collective expertise has contributed to the advancement of technologies in their respective fields.

Conclusion

Mau Chung Chang's innovative work in micro-electrome