Reinhard W Rosch

Title: Reinhard W. Rosch: Innovator in Telephone Line Interface Technology

Introduction

Reinhard W. Rosch is a notable inventor based in Richmond, California, recognized for his contributions to telecommunications technology. With a total of nine patents to his name, he has made significant advancements in the field of telephone line interface circuits.

Latest Patents

One of his latest patents is a "Telephone line interface circuit with voltage control." This invention features an active impedance line interface circuit designed for connection to a two-wire telephone line. It includes tip and ring unity gain d.c. amplifiers that are d.c. coupled via feed resistors to the tip and ring wires. The circuit monitors loop current and common mode current individually, converting them into digital signals for a digital control circuit. This control circuit can be programmed to provide desired operating conditions, allowing for reverse battery operations without a relay and adaptive adjustments based on monitored currents.

Another significant patent is the "Method of providing d.c. feed to a telephone line." This method supplies a two-wire telephone line with d.c. feed from a drive circuit that includes two amplifiers. The output potentials of these amplifiers determine the loop current on the line, which is monitored to control the supply voltage for the drive circuit. The current limiting voltage control acts iteratively to converge the supply voltage to a target voltage, ensuring stable operation.

Career Highlights

Reinhard W. Rosch has had a distinguished career at Northern Telecom Limited, where he has been instrumental in developing innovative telecommunications solutions. His work has significantly impacted the efficiency and reliability of telephone line interfaces.

Collaborations

Throughout his career, Reinhard has collaborated with notable colleagues, including Stanley D. Rosenbaum and Brian A. Sutherland. These collaborations have contributed to the advancement of technology in the telecommunications sector.

Conclusion

Reinhard W. Rosch's contributions to telephone line interface technology through his patents and work at Northern Telecom Limited highlight his role as a key innovator in the field. His inventions continue to influence the telecommunications industry, showcasing the importance of innovation in enhancing communication technologies.