Company Filing History:
4 out of 134 
2 out of 19 
1 out of 5 Years Active: 1997-2008
Title: The Innovations of Donald G. Carrigan
Introduction
Donald G. Carrigan is a notable inventor based in Monument, Colorado, with a remarkable portfolio of seven patents. His contributions to the field of memory technology have significantly advanced the performance and efficiency of dynamic random-access memory (DRAM) systems.
Latest Patents
One of Carrigan's latest patents is for an enhanced DRAM with embedded registers. This innovative design incorporates embedded row registers in the form of latches, which are strategically placed adjacent to the DRAM array. When the DRAM consists of multiple subarrays, these row registers are located between the subarrays. This configuration allows the registers to function as an on-chip cache, holding frequently accessed data corresponding to specific addresses in the DRAM. When an address is supplied, it is compared to the cache data. If they match, the cache data is read at SRAM speeds, decoupling the DRAM from this read operation. The DRAM remains idle during this process unless a precharge or refresh is required, which can occur concurrently with the cache read. If the addresses do not match, the DRAM is accessed, and the embedded register is updated with the new data. This asynchronous operation enhances the efficiency of DRAM systems by allowing precharging or refreshing during cache reads.
Career Highlights
Throughout his career, Carrigan has worked with several prominent companies, including Ramtron International Corporation and Enhanced Memory Systems, Inc. His expertise in memory technology has made him a valuable asset in the industry, contributing to advancements that have shaped modern computing.
Collaborations
Carrigan has collaborated with notable colleagues such as Ronald H. Sartore and Kenneth J. Mobley, further enriching his experience and contributions to the field.
Conclusion
Donald G. Carrigan's innovative work in the development of enhanced DRAM technology showcases his significant impact on the industry. His patents reflect a deep understanding of memory systems and their optimization, solidifying his legacy as a leading inventor in this domain.