Evert D Van Veldhuizen

Title: Evert D. Van Veldhuizen: Digital Receiver and Clock-Frequency Innovations

Introduction

Evert D. Van Veldhuizen is an inventor associated with Eindhoven, the Netherlands. His work includes inventions in digital communications and clock-frequency generation. He is credited with 7 patents and is associated with U.S. Philips Corporation.

Latest Patents

One of Van Veldhuizen’s patents, “Digital Communication Device,” describes a digital receiver that detects the difference between its local oscillator signal and the desired tuning frequency. A frequency controller uses this offset to derive short-term and long-term drift compensation signals, updating a stored control value at separate intervals. The short-term interval is substantially shorter than the long-term interval, allowing the receiver to compensate for frequency drift on different timescales.

Another patent, “Frequency Generating Circuit,” concerns generating a stable clock signal for a receiving apparatus using a low-cost oscillator. Depending on the embodiment, the circuit subtracts pulses from the oscillator output or adds and subtracts pulses to bring the generated clock frequency close to the desired frequency. It also compares clock-frequency variation across periods between reference signals and uses a control signal to adjust the output.

Career Highlights

The described inventions address practical challenges in receiver design: maintaining accurate tuning despite oscillator drift and producing a stable clock from economical components. These approaches combine signal measurement, frequency control, and timed adjustments to support reliable digital reception.

Collaborations

Van Veldhuizen’s listed coworkers include Chi-Tien Chen and Adrianus Van Bezooijen. His company affiliation is U.S. Philips Corporation.

Conclusion

Evert D. Van Veldhuizen’s patent work reflects a focus on frequency control and stability in digital receiving systems, with inventions designed to improve tuning accuracy and clock generation.