David J Morris

Title: Innovations of David J Morris

Introduction

David J Morris is an accomplished inventor based in Mayfield Heights, OH (US). He holds 2 patents that showcase his expertise in electronic circuit design and signal processing. His work has significantly contributed to advancements in resolver and encoder technologies.

Latest Patents

One of his latest patents is the "Resolver Excitation Circuit." This invention utilizes sine and cosine values stored in a read-only memory to generate waveforms. The circuit sequentially reads these values and passes them through a clocked data latch to a digital-to-analog converter. The output is then filtered to eliminate quantization error. Additionally, phase error is detected by timing the zero crossings of the generated waveforms and comparing them to a master synchronization signal. This allows for precise correction of phase error by controlling the timing of the latch.

Another notable patent is the "Encoder and Resolver Signal Processing Circuit." This circuit can be configured to process signals from either a resolver or an encoder to determine the sensed angular position. When set up for an encoder, the circuit periodically samples the encoder output, with the phase relationship of the input signals controlling a counter. In the resolver configuration, the counter is reset at regular intervals, and zero crossings from the resolver signal are detected to provide a measurement of the time interval, which corresponds to the phase angle and angular position.

Career Highlights

David J Morris is currently employed at Allen-Bradley Company, LLC, where he continues to innovate in the field of electronic circuits. His contributions have been instrumental in enhancing the performance and accuracy of various systems.

Collaborations

Throughout his career, David has collaborated with notable colleagues, including Ernst H Dummermuth and Michael F Korba. These partnerships have fostered a creative environment that encourages the development of cutting-edge technologies.

Conclusion

David J Morris is a prominent inventor whose work in resolver and encoder technologies has made a significant impact in the field of electronic engineering. His innovative patents reflect his dedication to advancing technology and improving system performance.