Lawrence A Walter

Title: The Innovations of Lawrence A. Walter

Introduction

Lawrence A. Walter is a notable inventor based in Lower Macungie Township, PA (US). He holds 2 patents that showcase his contributions to the field of integrated circuits and field effect transistors. His work has significantly impacted the technology landscape, particularly in the areas of semiconductor design and circuit efficiency.

Latest Patents

One of Walter's latest patents is for an integrated circuit resistor. This innovation involves a resistor formed by doping a semiconductor region defined by a layer, typically polysilicon, which also defines the gate electrode of field effect transistors in the integrated circuit. The well-controlled linewidth of features defined in this layer ensures tight resistor tolerance and allows the resistor value to track changes in other features defined by this layer.

Another significant patent is for a field effect transistor current source. This circuit generates a reference current that can achieve a desired temperature coefficient. The design is self-compensatory with respect to process variations, meaning that a 'slow' process will produce a higher than normal current, while a 'fast' process will yield a lower one. This results in a tight spread of slew-rate, gain, gain-bandwidth, and other parameters in operational amplifiers, comparators, and other linear circuits. A simple adjustment in the circuit allows the temperature coefficient to be made positive or negative if desired.

Career Highlights

Walter has had a distinguished career, working with prestigious organizations such as AT&T Bell Laboratories and American Telephone & Telegraph Company. His experience in these companies has allowed him to develop and refine his innovative ideas in the field of electronics.

Collaborations

Throughout his career, Walter has collaborated with notable colleagues, including Bernard L. Morris and Jeffrey J. Nagy. These collaborations have contributed to the advancement of technology in their respective fields.

Conclusion

Lawrence A. Walter's contributions to the field of integrated circuits and field effect transistors demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to enhancing circuit design and efficiency, making a lasting impact on the technology industry.