Company Filing History:
Years Active: 2010-2013
Title: Innovations of Cheng-Lun Chang
Introduction
Cheng-Lun Chang is a notable inventor based in San Jose, CA, with a focus on advancements in memory apparatus and multimedia system-on-chip (SoC) design. He holds a total of 3 patents, showcasing his contributions to the field of technology.
Latest Patents
One of his latest patents is the "External memory based FIFO apparatus." This invention involves an xFIFO apparatus that is coupled to an external memory and a register bus. The xFIFO apparatus includes an xFIFO engine, a wDMA engine, an rDMA engine, a first virtual FIFO, and a second virtual FIFO. The xFIFO engine receives a FIFO command from the register bus and generates both writing and reading DMA commands. The wDMA engine forwards incoming data to the external memory, while the rDMA engine pre-fetches FIFO data from the external memory. The synchronization between the wDMA and rDMA engines is achieved through the virtual FIFOs.
Another significant patent is the "Self-synchronizing hardware/software interface for multimedia SOC design." This innovation eliminates the forced lock-step operation between a CPU and hardware by allowing the CPU to focus on its tasks without monitoring the hardware. A data/control message queue is utilized, where the CPU writes combined messages and places an End tag when finished. The hardware then processes the data from the queue and raises an interrupt signal to the CPU upon reaching the End tag. This design allows for compensation of speed differences between hardware and software by adjusting the queue depth.
Career Highlights
Cheng-Lun Chang has worked with several companies throughout his career, including Mobilic Technology Corp. and Ablaze Wireless, Inc. His experience in these organizations has contributed to his expertise in developing innovative technologies.
Collaborations
Cheng-Lun has collaborated with notable individuals in the field, including Ching-Han Tsai and Lincheng Wang. These partnerships have likely enhanced his work and led to further advancements in his projects.
Conclusion
Cheng-Lun Chang's contributions to technology through his patents and collaborations highlight his innovative spirit and dedication to advancing the field. His work continues to influence the development of memory systems and multimedia designs.