Joseph Gerard Petrofsky

Title: Joseph Gerard Petrofsky: Innovator in Notch Filter Technology

Introduction

Joseph Gerard Petrofsky is a notable inventor based in Cupertino, CA (US). He holds a total of 15 patents, showcasing his significant contributions to the field of technology. His work primarily focuses on advancements in electronic filtering systems.

Latest Patents

One of Petrofsky's latest innovations is a notch filter for ripple reduction. This notch filter is controlled synchronously with a chopper to effectively filter out chopping ripple. In one embodiment, the notch filter is coupled to the differential output of the chopper and includes a sampling capacitor, a hold capacitor, and a second set of switches between the sampling capacitor and the hold capacitor. The second set of switches is temporarily closed once per chopper switching cycle to transfer charge from the sampling capacitor to the hold capacitor, ensuring that the ripple from the chopper is not transferred to the hold capacitor. The voltage across the hold capacitor can be coupled to any other circuit, such as the differential inputs of an amplifier.

Career Highlights

Throughout his career, Joseph Petrofsky has worked with prominent companies, including Linear Technology Corporation and Acuson Corporation. His experience in these organizations has contributed to his expertise in electronic systems and innovations.

Collaborations

Some of his notable coworkers include Samuel H. Maslak and Christopher R. Cole. Their collaborations have likely played a role in advancing their shared projects and innovations.

Conclusion

Joseph Gerard Petrofsky is a distinguished inventor whose work in notch filter technology has made a significant impact in the field. His numerous patents and collaborations reflect his dedication to innovation and excellence in technology.