John R Cressey

Title: Innovations of John R Cressey

Introduction

John R Cressey is an accomplished inventor based in College Park, MD (US). He holds 2 patents that showcase his expertise in digital frequency generation and signal decoding technologies. His innovative contributions have made a significant impact in the field of electronics.

Latest Patents

Cressey's latest patents include a "Variable Digital Frequency Generator with Value Storage" and a "Synchronous Digital QPSK Demodulator with Carrier Error Correction." The variable digital frequency generator allows for the control of pulse sequence characteristics, such as frequency, through a simple circuit without the need for specific storage components. This invention utilizes phase shifts between waveforms to maintain the cumulative effect of control signals, enabling the addition or deletion of pulses in a pulse stream based on external control signals.

The synchronous digital QPSK demodulator focuses on decoding differential phase shift keyed signals. It employs a counter that identifies a decision threshold for the received signal during an integration interval. The counter's contents represent phase error in the reconstructed carrier, allowing for accurate signal decoding. This innovative approach enhances the reliability of communication systems.

Career Highlights

Throughout his career, John R Cressey has worked with notable companies such as Case Communications Inc. and Rixon Inc. His experience in these organizations has contributed to his development as a leading inventor in his field.

Collaborations

Cressey has collaborated with talented individuals, including Stephen A Miller and Dennis C Meneely. These partnerships have fostered innovation and creativity in his projects.

Conclusion

John R Cressey's contributions to the field of electronics through his patents and collaborations highlight his role as a significant inventor. His work continues to influence advancements in digital frequency generation and signal processing technologies.