Chin-san Wu

Title: Chin-san Wu and Wide Dynamic Range Amplifier Technology.

Introduction

Chin-san Wu is an inventor associated with Nan Da, Taiwan. His patent work includes a circuit designed to provide automatic level control across a broad range of input voltages, with an application in speech electronics.

Latest Patents

Wu is credited with 1 patent: “Wide Dynamic Input Range Transconductor-Based Amplifier Circuit for a Two-Opamp Gain Stage Wide Dynamic Range Automatic Level Control Circuit.” The invention describes a two-stage amplifier in which a transconductor device acts as a voltage-controlled resistor in the first stage’s feedback loop. A peak detector monitors the second stage’s output, and a converter compares the detected peak with a preset voltage to generate the transconductor’s control voltage. When activated, the device reduces the first stage’s gain, helping prevent excessive output while allowing the circuit to handle a broad range of input voltages. The design also reduces the circuit’s dependence on the transconductor’s performance, simplifying its implementation.

Career Highlights

Wu’s documented patent contribution focuses on automatic level control for speech-related electronic circuitry. The disclosed approach combines two op-amp gain stages, feedback control, and peak detection to manage signal levels.

Collaborations

Wu is associated with Macronix International Co., Ltd. His listed coworker is Chun-Hsien Su.

Conclusion

Chin-san Wu’s patent describes a wide-dynamic-range amplifier circuit that uses feedback and gain control to support automatic level management in speech applications.