Company Filing History:
Years Active: 1996-2001
Title: Innovations of Inventor Wen Fang
Introduction
Wen Fang is an accomplished inventor based in Fremont, California. He has made significant contributions to the field of electronics, particularly in the development of low-noise amplifiers and power-efficient phase lock loop circuits. With a total of two patents to his name, his work showcases a blend of innovation and practical application.
Latest Patents
Wen Fang's latest patents include a low-noise magneto-resistive amplifier using CMOS technology. This invention features a low-noise magneto-resistive pre-amplifier circuit that amplifies signals from a magneto-resistive head. The MR head is biased at an optimal point by a current source, which is powered by a regulator to minimize noise contributions. Additionally, his self-biased CMOS low-noise amplifier minimizes input-referred noise without the need for a negative power supply. The design incorporates a small MOS transistor with a feedback tracking loop, which replaces the self-bias resistor, allowing for the use of large-value resistors and enabling on-chip integration of a DC blocking input capacitor. Furthermore, the Gm-Gm amplifier configuration enhances the gain bandwidth product while minimizing parasitic effects of MOS transistors.
Another notable patent is the low power phase lock loop clocking circuit designed for battery-powered systems. This PLL circuit operates in active, sleep, and idle modes, with the idle mode drawing significantly less power. The PLL periodically refreshes itself to maintain the designed operating frequency. The power consumption is dependent on the ratio of on-time to off-time, which is a fraction of the power consumed in the active mode. The PLL is designed to receive an external clock signal as a reference clock, from which it develops the internal system clock. It also includes a zero-phase-restart circuit to synchronize with the external reference clock.
Career Highlights
Wen Fang has worked with notable companies such as Cirrus Logic Inc. and Marvell Technology Group Ltd. His experience in these organizations has contributed to his expertise in electronic innovations and patent development.
Collaborations
Wen Fang has collaborated with Gani Jusuf, a talented woman in the field, further enhancing his work through shared knowledge and expertise.
Conclusion
Wen Fang's contributions to the field of electronics through his innovative patents demonstrate his commitment to advancing technology. His work in low-noise amplifiers and power-efficient