Jader Alves De Lima Filho

Title: Jader Alves De Lima Filho: Innovator in Current Sensing Technology

Introduction

Jader Alves De Lima Filho is a notable inventor based in Campinas, Brazil. He has made significant contributions to the field of current sensing technology, holding a total of 4 patents. His work focuses on enhancing the accuracy and efficiency of current sensors used in various electronic applications.

Latest Patents

One of Jader's latest patents is a "Differential current sensor device and method." This invention features a current sensor that utilizes a pair of sense transistors to detect the current conducted by a power transistor in a voltage regulator. The design incorporates a scaling factor M, which is determined by the size ratio between the power transistor and the sense transistors. Each sense transistor is paired with a series-connected sense resistor, which is intentionally unbalanced to provide a differential voltage based on the sensed current. This voltage is then relayed to a transconductor, which has heavy emitter degeneration to ensure that the output current is substantially proportional to the current conducted by the primary power transistor.

Another significant patent is the "Current sensor device," which accurately senses the current at a sense transistor and generates an output current that represents this current proportionally. This design ensures that the sensed current remains relatively independent of the resistive load of the feedback control module to which it is applied. In one embodiment, the feedback control module utilizes the sensed current in a DC-DC voltage converter to maintain voltage regulation. The current sensor employs operational amplifiers to match voltages at the current electrodes of both the output-generating transistor and the sense transistor, ensuring high effective resistance and independence from the feedback control module's resistive load.

Career Highlights

Jader Alves De Lima Filho is currently employed at Freescale Semiconductor, Inc., where he continues to innovate in the field of electronic components. His work has significantly impacted the development of efficient current sensing technologies, which are crucial for modern electronic devices.

Collaborations

Throughout his career, Jader has collaborated with talented individuals such as Wallace Alane Pimenta and Stefano Pietri. These collaborations have fostered an environment of innovation and creativity, leading to advancements in current sensing technology.

Conclusion

Jader Alves De Lima Filho is a prominent inventor whose work in current sensing technology has led to multiple patents and significant advancements in the field. His contributions continue to influence