Craig A Keller

Title: The Innovative Contributions of Craig A Keller

Introduction

Craig A Keller is a notable inventor based in Menlo Park, California. He has made significant contributions to the field of mass spectrometry, holding a total of four patents. His work focuses on enhancing the functionality and efficiency of ion optics and signal amplification in mass spectrometers.

Latest Patents

One of his latest patents is titled "Dynamic biasing of ion optics in a mass spectrometer." This invention involves a device designed to dynamically bias an ion optic element within a mass spectrometer. The device comprises a voltage source, a first ion optical element connected to the voltage source, a second ion optical element resistively coupled to the first, and a pulse generator capacitively coupled with the second ion optical element. The pulse generator applies a series of pulses to the second ion optical element, generating a dynamic voltage bias that can be controlled by adjusting the characteristics of the applied pulses, such as pulse width, amplitude, and repetition rate.

Another significant patent is "Non-linear signal amplifiers and uses thereof in a mass spectrometer device." This invention features signal amplifiers with a non-linear transfer function. It provides a high-speed circuit that can accurately approximate any monotonic function, such as a square root transfer function, over a limited range of input signals. The design includes a piecewise non-linear circuit arrangement that utilizes a set of non-linear sub-circuits to generate a desired non-linear transfer function across an extended dynamic range of input signals.

Career Highlights

Throughout his career, Craig A Keller has worked with prominent companies in the biotechnology and laboratory equipment sectors. He has been associated with Ciphergen Biosystems, Inc. and Bio-Rad Laboratories, Inc., where he contributed to advancements in mass spectrometry technologies.

Collaborations

Craig has collaborated with several professionals in his field, including Michael G Youngquist and Fiona L Plows. Their combined expertise has likely contributed to the innovative developments in mass spectrometry.

Conclusion

Craig A Keller's contributions to the field of mass spectrometry through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the efficiency and functionality of mass spectrometry devices.