Jan R Hofland

Title: Jan R Hofland: Innovator in Digital Signal Processing

Introduction

Jan R Hofland is a notable inventor based in Everett, WA (US). She has made significant contributions to the field of digital signal processing, holding 2 patents that showcase her innovative approach to technology. Her work primarily focuses on methods and apparatuses that enhance the functionality and reliability of digital circuits.

Latest Patents

One of Hofland's latest patents is titled "Method and apparatus for AC coupling." This invention involves a feedback circuit that detects a DC component in the coupled signal and adjusts a DC subtraction signal accordingly. In one embodiment, a digital signal processor (DSP) analyzes the coupled signal for any remaining DC component and controls the subtraction signal. The use of a DSP allows for dynamic control of parameters, including AC cutoff frequency, gain, and transfer function. Another embodiment provides accurately phase-matched AC coupling across two or more signal channels.

Her second patent, "Apparatus and method for testing digital circuits," discloses a device that converts a digital signal or bit stream into a digital signature representative of the digital signal through a feedback shift register. This apparatus can identify and characterize digital signals at various test points for testing purposes. Signatures from properly operating circuits can be recorded for later comparison with those from circuits under test. This comparison enables users to determine whether the circuit is functioning correctly and to locate faults when necessary. Additionally, the apparatus can examine digital signals to identify transient errors.

Career Highlights

Jan R Hofland has built a successful career at Hewlett-Packard Company, where she has applied her expertise in digital signal processing. Her innovative work has contributed to advancements in the testing and analysis of digital circuits, making her a valuable asset to her team and the industry.

Collaborations

Hofland has collaborated with notable colleagues, including Gary B Gordon and George A Haag. These partnerships have further enriched her work and contributed to the development of her patents.

Conclusion

Jan R Hofland is a distinguished inventor whose contributions to digital signal processing have had a significant impact on the field. Her innovative patents reflect her commitment to enhancing technology and improving the functionality of digital circuits.