Location History:
- Cockeysville, MD (US) (1987)
- Sparks, MD (US) (1989 - 1997)
- Pasadena, MD (US) (2007)
Company Filing History:
3 out of 8,033 
2 out of 3,385 
Years Active: 1987-2007
Title: Innovations of Norman G Matthews
Introduction
Norman G Matthews is a notable inventor based in Sparks, MD (US). He has made significant contributions to the field of electronics, particularly in the development of crystal oscillators and frequency synthesizers. With a total of 5 patents to his name, Matthews has demonstrated a commitment to advancing technology through his innovative designs.
Latest Patents
One of his latest patents is a crystal oscillator with a wide tuning range. This invention features a crystal filter with multiple crystals arranged in a ladder configuration, resonant at a desired operating frequency. The design includes an oscillatory signal loop feedback path that incorporates a voltage-controlled phase shifter. This phase shifter is operable to adjust the phase of the signal in the feedback loop in response to an applied control voltage. Additionally, the feedback loop contains a loop phase shift circuit to ensure that the feedback signal is a multiple of 360°, along with a band pass mode selection circuit to eliminate unwanted frequencies.
Another significant patent is a direct frequency synthesizer having moderate bandwidth. This low-cost synthesizer is designed to operate with moderate bandwidth while maintaining good noise performance and superior spurious performance. It employs a starter frequency signal and a set of local oscillator (LO) frequency signals spaced from each other by a frequency increment. The mixer circuit generates a product of the starter frequency signal and the LO frequency signals, while a divider has a ratio equal to N. The design ensures that the output maintains a moderate bandwidth.
Career Highlights
Throughout his career, Norman G Matthews has worked with prominent companies such as Westinghouse Electric Corporation and Northrop Grumman Systems Corporation. His experience in these organizations has contributed to his expertise in the field of electronics and innovation.
Collaborations
Matthews has collaborated with notable coworkers, including Michael M Driscoll and John L Nugent. These partnerships have likely fostered an environment of creativity and innovation, leading to the development of groundbreaking technologies.
Conclusion
Norman G Matthews is a distinguished inventor whose work in crystal oscillators and frequency synthesizers has made a lasting impact on the electronics industry. His innovative patents and collaborations reflect his dedication to advancing technology.