Stephen A Cohen

Title: Innovations of Stephen A. Cohen

Introduction

Stephen A. Cohen is a notable inventor based in Andover, MA (US). He holds a total of 6 patents that showcase his contributions to the field of electronics and automatic testing equipment. His work has significantly impacted the industry, particularly in the areas of calibration control and current mirror technology.

Latest Patents

One of his latest patents is titled "Calibration control for pin electronics of automatic testing equipment." This invention discloses an integrated circuit designed for automatic calibration control of pin electronics. The integrated circuit comprises a substrate, along with pin electronics and a calibration circuit that is integral to the substrate. The calibration circuit is dedicated to a single channel of automatic testing equipment for a single pin of a device under test. Each sub-circuit of the pin electronics may include a replica output that is electrically coupled to the calibration circuit. The calibration circuit may also include a multiplexor for receiving each of the replica outputs from the sub-circuits, such as a comparator, load, and driver, and for selectively switching between the replica outputs to determine calibration parameters for one or more levels of the sub-circuit. Additionally, the calibration circuit includes a state machine capable of determining calibration parameters, including offset and gain. After determining these parameters, the state machine can compensate the one or more levels for each sub-circuit of the pin electronics based on the calibration parameters.

Another significant patent is the "Current mirror apparatus and method for reduced early effect." This current mirror includes an output stage that responds to changes in mirror output voltage with corresponding changes in output stage current. An output compensation stage introduces an output compensation current to counteract changes in mirror output current resulting from variations in output stage current.

Career Highlights

Stephen A. Cohen has worked with prominent companies in the electronics industry, including Analog Devices, Inc. and Teradyne, Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in technology.

Collaborations

Throughout his career, Cohen has collaborated with talented individuals such as Jiann-Neng Chen and Timothy W. Sheen. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Stephen A. Cohen's contributions to the field of electronics through his patents and collaborations highlight his innovative spirit and dedication to advancing technology