David S Nack

Title: David S Nack - Innovator in Phase-Locked Loop Technology

Introduction

David S Nack is a notable inventor based in Roseville, CA (US). He has made significant contributions to the field of electronics, particularly in the development of phase-locked loop circuits. His innovative approach has led to advancements that enhance the performance and stability of these circuits.

Latest Patents

David S Nack holds a patent for a "Modified third order phase-locked loop." This invention discloses a phase-locked loop circuit that exhibits a wide capture range and a low quality factor (Q). This design prevents ringing and improves stability without adding area, increasing power consumption, or increasing noise levels. The circuit includes a comparator to generate an error signal, an oscillator that produces an output signal in response to a control signal, and a loop filter that generates the control signal based on the error signal. The loop filter features a first integrator coupled through a threshold limit detector to a second integrator. The threshold limit detector supplies an electric charge to the second integrator only when the first integrator is near its operating limits. The oscillator generates an output signal that tracks the input reference signal frequency as an integer multiple of that frequency, responding to varying current levels of the control signal. Additionally, the loop filter includes a pump-up and a pump-down charge pump that operate in tandem under the activation of the threshold limit detector, along with a duty cycle limiter switch that restricts the charge supply to the second integrator to a predetermined time period.

Career Highlights

David S Nack is associated with Level One Communications, Inc., where he has applied his expertise in electronic circuit design. His work has contributed to the advancement of communication technologies, making them more efficient and reliable.

Collaborations

Throughout his career, David has collaborated with notable colleagues, including James W Everitt and James G Parker. These collaborations have fostered innovation and have led to the development of cutting-edge technologies in the field.

Conclusion

David S Nack is a distinguished inventor whose work in phase-locked loop technology has made a significant impact on the electronics industry. His innovative designs continue to influence advancements in communication systems.