William H Posner

Title: William H Posner: Innovator in Video Signal Technology

Introduction

William H Posner is an accomplished inventor known for his contributions to video signal technology. He has developed innovative solutions that enhance the processing of composite video signals, particularly in the realm of closed captioning. His work has significantly impacted the way video signals are synchronized and displayed.

Latest Patents

William H Posner holds a notable patent titled "Video Signal Data And Composite Synchronization Extraction Circuit For On-Screen Display." This invention focuses on a composite synchronization extraction circuit that is particularly suited for receiving composite video signals containing closed captioning data. The circuit utilizes a signal CMOS integrated circuit device to achieve its functionality.

The design incorporates a dual mode voltage clamp realized in CMOS technology. This clamp includes temperature-compensated current sources in the form of complementary current mirrors. These mirrors charge and discharge a clamped composite synchronization node with the aid of a comparator, which controls a transistor for charging the node. The detected pulse amplitude is set by slicing the incoming pulse at the back porch level and then amplifying it for comparison with the back porch level derived from a sample-and-hold device.

Frequency and phase synchronization are accomplished through a combination of frequency lock loop and phase lock loop working together to generate a control voltage for a voltage-controlled oscillator in a flywheel mode. This oscillator is designed to be immune to noise in the incoming signal, providing a clean source of timing information for the circuit.

Career Highlights

Throughout his career, William H Posner has worked with various companies, including EEG Enterprises, Inc. and Extratek, Inc. His experience in these organizations has allowed him to refine his skills and contribute to advancements in video technology.

Collaborations

William has collaborated with notable individuals in the field, including Eric B Berman and Apparajan Ganesan. These partnerships have fostered innovation and the sharing of ideas, further enhancing the development of video signal technologies.

Conclusion

William H Posner is a significant figure in the realm of video signal technology, with a focus on synchronization and display innovations. His contributions have paved the way for advancements in how video signals are processed and displayed, particularly in relation to closed captioning.