Rahul Ranjan

Title: Innovations by Inventor Rahul Ranjan in Memory Subsystem Technology

Introduction

Rahul Ranjan, an accomplished inventor based in Clara, California, has made significant contributions to the field of memory subsystem technology. With a total of four patents to his name, Ranjan continues to drive innovations in memory calibration methods that enhance performance in electronic devices.

Latest Patents

Ranjan's latest innovations include two notable patents:

1. **Memory Subsystem Calibration Using Substitute Results**

This patent discloses a memory subsystem and a method for performing calibrations. The memory subsystem includes a memory controller coupled to a memory via multiple signal paths. The memory controller is designed to conduct an initial calibration to determine eye patterns for these signal paths. In subsequent calibrations, updated eye patterns are derived for a subset of signal paths, while the remaining non-active paths utilize proxy data for calibration. This inventive approach allows for improved accuracy and efficiency in memory calibration processes.

2. **Nominal Distance Reference Voltage Calibration**

This patent addresses reference voltage calibration. It outlines an apparatus comprising memory and a memory controller equipped with a calibration circuit. The circuit performs reference voltage calibration to distinguish logic values read from memory. It involves conducting horizontal calibrations at varied reference voltage values to analyze delay values that enable valid data reads, selecting a calibrated reference voltage based on performance scores derived from these calibrations.

Career Highlights

Rahul Ranjan is currently employed at Apple Inc., where he leverages his expertise in memory systems to improve product performance. His focus on innovative calibration methods plays a key role in advancing Apple's technology offerings.

Collaborations

Throughout his career, Ranjan has collaborated with notable colleagues, including Robert E. Jeter and Kai Lun Hsiung. These partnerships have facilitated the exchange of ideas and further driven the development of cutting-edge memory technologies.

Conclusion

Inventor Rahul Ranjan has established a reputation for excellence in memory subsystem innovations. His patents not only reflect his skills as an inventor but also contribute to the advancement of technology within the field. As he continues to work at Apple Inc., his ongoing research and development are set to impact the industry significantly.