David C Littlejohn

Title: David C Littlejohn: Innovator in Analog Interface Circuits

Introduction

David C Littlejohn is a notable inventor based in Marshfield Hills, MA (US). He has made significant contributions to the field of process control through his innovative designs. His work primarily focuses on developing analog interface circuits that enhance the functionality of process controllers.

Latest Patents

David C Littlejohn holds a patent for "Analog interface circuits for process controllers and process monitors." This invention allows analog signals to be input into a process controller via a binary interface. It also enables the output of analog signals from the process controller through the same binary interface. The input analog signal is converted into a digital sample of N bits, which is transmitted to the process controller at a compatible rate. The process controller is equipped with a software routine that recognizes the identification pulse and the digital sample. This interface circuit can support multiple channels for inputting or outputting various analog signals. He has 1 patent to his name.

Career Highlights

David is associated with Interactive Process Controls Corporation, where he applies his expertise in process control technologies. His work has been instrumental in advancing the capabilities of process monitoring systems.

Collaborations

David has collaborated with notable colleagues, including Kevin V Roach and James G Calvin, contributing to various projects within the field of process control.

Conclusion

David C Littlejohn's innovative work in analog interface circuits has significantly impacted the process control industry. His contributions continue to enhance the efficiency and functionality of process monitoring systems.