John P Mullaney

Title: The Innovations of John P. Mullaney

Introduction

John P. Mullaney is a notable inventor based in Minneapolis, MN, with a significant contribution to the field of technology. He holds four patents, showcasing his expertise and innovative spirit in developing advanced electronic systems. His work primarily focuses on high-speed data transmission and routing circuits.

Latest Patents

One of Mullaney's latest patents is the "High speed cross point switch routing circuit with word-synchronous serial back plane." This invention involves an asynchronous serial crosspoint switch that is synchronized to multiple transceiver circuits. The crosspoint switch generates both a master bit clock and a master word clock signal. A transceiver circuit recovers the master bit clock signal from an incoming high-speed serial data stream using a clock and data recovery circuit. The recovered bit clock signal serves as a timing signal for data serialization and transmission to the crosspoint switch circuit. The data stream is frequency locked to the master bit clock signal, allowing for phase adjustments with a data recovery circuit. To recover word timing, the switch circuit issues alignment words to the transceivers during link initialization. The transceivers perform word alignment and establish a local word lock. If misalignment occurs, the transceiver shifts its transmitted word by one bit and retries. The necessary edge transition density is provided by overhead bits, which also designate special command words between a transceiver and a switch circuit. Flow control information is routed from a receiving transceiver back to the transmitting transceiver using the overhead bits to assert flow control signals.

Career Highlights

Throughout his career, Mullaney has worked with prominent companies such as Vitesse Semiconductor Corporation and Network Systems Corporation. His experience in these organizations has contributed to his development of innovative technologies and solutions in the field of electronics.

Collaborations

Mullaney has collaborated with notable individuals in his field, including Gary Brian Lee and Denton G. Wicklund. These collaborations have likely enriched his work and led to further advancements in technology.

Conclusion

John P. Mullaney's contributions to the field of technology through his patents and collaborations highlight his innovative spirit and expertise. His work continues to influence advancements in high-speed data transmission and routing circuits.