Chit Ah Mak

Title: Chit Ah Mak: Innovator in Gain Control Circuits and CMOS Technology

Introduction

Chit Ah Mak is a notable inventor based in Fremont, CA, who has made significant contributions to the field of electronics. He holds 2 patents that showcase his innovative approach to circuit design and functionality. His work primarily focuses on gain control circuits and CMOS technology, which are essential in modern electronic devices.

Latest Patents

One of Chit Ah Mak's latest patents is a gain control circuit. This circuit includes a resistor with a first terminal and a second terminal, an operational amplifier with an inverting terminal electrically coupled to the first terminal of the resistor, a non-inverting terminal, and an output terminal. The circuit transforms the voltage change of the operational amplifier output into a substantially exponential current change. This gain control circuit is designed to perform wide bandwidth input signal buffering with linearity under low voltage and low power conditions. It also offers low output impedances without the need for additional buffers, thereby minimizing circuit size and manufacturing costs.

Another significant patent is the overvoltage tolerant CMOS tristate output buffer. This buffer is capable of withstanding tristate overvoltages without reverse currents or latch-up. It features a stabilized protection circuit that drives the N-well and gate of the P-channel driver transistor to the output pad voltage when the output pad voltage becomes excessive. The inclusion of a hysteresis circuit in the protection circuit helps control switch transistors, preventing excessive switching of the N-well biasing transistors when the output pad voltage varies near the output buffer power supply voltage during tristate.

Career Highlights

Chit Ah Mak has worked with several reputable companies throughout his career. Notably, he has been associated with Quality Semiconductor Inc. and the Hong Kong Applied Science and Technology Research Institute Company, Limited. His experience in these organizations has contributed to his expertise in circuit design and innovation.

Collaborations

Chit Ah Mak has collaborated with talented individuals in the field, including Hung T Nguyen and Steve W Liu. These collaborations have likely enriched his work and led to further advancements in his projects.

Conclusion

Chit Ah Mak is a distinguished inventor whose contributions to gain control circuits and CMOS technology have made a significant impact in the electronics industry. His innovative designs and patents reflect his commitment to advancing technology and improving circuit efficiency.