Xiaole Chen

Title: Innovations of Inventor Xiaole Chen

Introduction

Xiaole Chen is a notable inventor based in Milpitas, CA (US). She has made significant contributions to the field of electronics, particularly in the development of advanced filtering technologies. With a total of 6 patents to her name, her work has had a considerable impact on the industry.

Latest Patents

One of Xiaole Chen's latest patents is a highly-linear continuous-time filter designed for a 3-volt supply. This innovative filter maintains high linearity even when operating with reduced power supplies. The design incorporates resistor networks attached to each input of a differential operational amplifier (op-amp). These networks utilize fixed resistors in series between the inputs and an intermediate node, along with a fixed input resistor that enhances linearity compared to a linear transistor. A transistor connects the internal node to ground, functioning as a variable resistor to adjust the equivalent resistance of the network. The control voltage applied to the gate of the transistor is generated by an analog control loop, which continuously adjusts the control voltage and resistance as the filter operates. Additionally, a voltage comparator detects when the control voltage is out of range, activating a calibration signal that halts filtering while a digital successive-approximation register adjusts the capacitances of feedback capacitors around the op-amps.

Another significant invention is the CMOS soft clipper, which allows for programmable knee levels and slopes of the curve after the knee. This is achieved by placing a second transconductance in parallel with the first and using a switching circuit to connect their outputs when the knee level is reached. A comparator, coupled to the second transconductance, controls the switching circuit, enabling precise adjustments.

Career Highlights

Xiaole Chen has worked with prominent companies such as Exar Corporation and Centillium Communications, Inc. Her experience in these organizations has contributed to her expertise in electronic innovations and patent development.

Collaborations

Xiaole has collaborated with various professionals in her field, including her coworker Roger A Levinson, who has also contributed to advancements in technology.

Conclusion

Xiaole Chen's innovative work in electronics, particularly her patents related to filtering technologies, showcases her significant contributions to the industry. Her career reflects a commitment to advancing electronic design and functionality.