California Institute of Technology

United States of America As Represented by the Administrator of Nasa

Gary R Burke

Ara N Chutjian

Mohammad Mehdi Mojarradi

Murray R Darrach

Brent R Blaes

Douglas J Sheldon

Tuan A Tran

John A MacAskill

David Q Zhu

Stojan M Madzunkov

John L Thomas

Ryan A Stern

Yuan Chen

Rembrandt Thomas Schaefer

A high resolution circuit and method for facilitating precise measurement of on-chip delays for FPGAs for reliability studies. The circuit embeds a pulse generator on an FPGA chip having one or more groups of LUTS (the 'LUT delay chain'), also on-chip. The circuit also embeds a pulse width measurement circuit on-chip, and measures the duration of the generated pulse through the delay chain. The pulse width of the output pulse represents the delay through the delay chain without any I/O delay. The pulse width measurement circuit uses an additional asynchronous clock autonomous from the main clock and the FPGA propagation delay can be displayed on a hex display continuously for testing purposes.

Precise delay measurement through combinatorial logic

The present invention discloses an mixed signal RF drive electronics board that offers small, low power, reliable, and customizable method for driving and generating mass spectra from a mass spectrometer, and for control of other functions such as electron ionizer, ion focusing, single-ion detection, multi-channel data accumulation and, if desired, front-end interfaces such as pumps, valves, heaters, and columns.

Electronic drive and acquisition system for mass spectrometry

Growing community of inventors

Moorpark, CA, United States of America

Gary R Burke