John M Scharr

Title: Innovations of John M. Scharr

Introduction

John M. Scharr is a notable inventor based in Canandaigua, NY (US), recognized for his contributions to technology through his innovative patents. With a total of five patents to his name, Scharr has made significant advancements in the field of component subsystems and memory arrays. His work primarily focuses on enhancing security and ensuring proper electrical connections in memory systems.

Latest Patents

One of Scharr's latest patents is titled "Security enhancement of customer replaceable unit monitor (CRUM)." This invention involves a component subsystem and a method for authenticating the subsystem, which can be installed in a host device. The authentication protocol includes a process where the host device sends a test voltage value to the component subsystem. The subsystem generates a test voltage based on this value, which is then applied to a test cell containing a wordline, a bitline, and a memory film. A response voltage is read from the bitline and compared to an expected value. If the response voltage matches the expected value, the functionality of the host device and/or component subsystem is enabled. Conversely, if it does not match, the functionality is disabled.

Another significant patent by Scharr is "Pad detection through pattern analysis." This method ensures that a memory array, such as a ferroelectric memory array, is properly electrically connected. The process may be performed prior to a read or write cycle or during functional testing of the memory array. In one implementation, the memory array is read, and a data set from each cell is stored in a register. A solid logic 0's pattern is then written into the memory array, and each cell is read. If no cell returns a logic 1, it indicates that the memory array is properly connected, and the register data values are written to the memory array. If one or more cells return a logic 1, it indicates an improper connection, prompting the removal and reinstallation of the memory array.

Career Highlights

John M. Scharr is currently employed at Xerox Corporation, where he continues to innovate and contribute to the field of technology. His work at Xerox has allowed him to develop and refine his inventions, making a lasting impact on the industry.

Collaborations

Throughout his career, Scharr has collaborated with notable colleagues, including Christopher P. Caporale and Alberto Rodriguez. These collaborations have fostered an