Company Filing History:

8 out of 9,166

Industrial Technology Research Institute

patents

1 out of 1

Computer Communication Research Labs.

patent

1 out of 1

Industrial Technology Research Institute--Computer & Communication

patent

4. 2 out of 832,912

Other

patents

where one patent can have more than one assignee

Years Active: 1998-2001

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11 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6198317 - Frequency multiplication circuit (2001-03-06),

2. 6094086 - High drive CMOS output buffer with fast and slow speed controls (2000-07-25),

3. 6060922 - Duty cycle control buffer circuit with selective frequency dividing (2000-05-09),

4. 6060906 - Bidirectional buffer with active pull-up/latch circuit for mixed-voltage (2000-05-09),

5. 6002599 - Voltage regulation circuit with adaptive swing clock scheme (1999-12-14),

6. 5917348 - CMOS bidirectional buffer for mixed voltage applications (1999-06-29),

7. 5854560 - CMOS output buffer having a high current driving capability with low (1998-12-29),

8. 5850159 - High and low speed output buffer with controlled slew rate (1998-12-15),

9. 5781026 - CMOS level shifter with steady-state and transient drivers (1998-07-14),

10. 5757242 - Low power consumption oscillators with output level shifters (1998-05-26),

11. 5708386 - CMOS output buffer with reduced L-DI/DT noise (1998-01-13),

Title: Hwang-Cherng Chow: Innovator in Frequency Multiplication Circuits

Introduction

Hwang-Cherng Chow is a prominent inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of electronics, particularly in the development of frequency multiplication circuits. With a total of 11 patents to his name, Chow's work has had a lasting impact on the industry.

Latest Patents

Chow's latest patents include a frequency multiplication circuit that utilizes duty cycle control buffers in combination with edge detectors. This innovative circuit provides both multiplication and 50% duty cycle adjustment. The design features parallel branches of duty cycle control buffers preset for respective duty cycles of 1/N, 2/N, and so on. The buffers receive a common edge detected input signal and output their respective duty cycle adjusted clock signals simultaneously. Additionally, a rising and falling edge detector generates a pulse train at double the frequency of the 1/N buffer output. The output pulse train achieves a frequency N times the input clock frequency, with a final stage duty cycle control buffer ensuring a 50% duty cycle output.

Another notable patent is the high drive CMOS output buffer with fast and slow speed controls. This output buffer receives an input signal and drives an output terminal. It features a first driver and a second driver, with the second driver having a greater current driving capacity. The control circuitry detects transitions in the logic value of the input signal and generates a pulse aligned with the input signal's logic value transition. This design enhances the performance and reliability of electronic devices.

Career Highlights

Chow has worked at the Industrial Technology Research Institute, where he has contributed to various projects and innovations. His expertise in electronics and circuit design has made him a valuable asset in the field.

Collaborations

Chow has collaborated with notable colleagues such as Chi-Chang Shuai and Yuan-Hua Chu. Their combined efforts have led to advancements in technology and innovation.

Conclusion

Hwang-Cherng Chow is a distinguished inventor whose work in frequency multiplication circuits has significantly influenced the electronics industry. His innovative patents and collaborations highlight his commitment to advancing technology.

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