Abstract: This disclosure provides systems, methods, and apparatus for implementing multiple test and measurement devices into a single multi-instrument device (102). The device can include at least one field programmable gate array, FPGA (112), that allows partial reconfiguration. One or more dynamic reconfigurable portions of the FPGA can be configured to function as one or more test and measurement devices. The device can provide outputs of each of the test and measurement instruments to a client device, which can display the outputs to a user. The device can be reconfigured by loading bitstreams (122,136) associated with the desired test and measurement device. The bitstreams can be loaded from the client device (104), a server (106), or from a memory storage unit (114) of the device itself.

Abstract: Programming field programmable gate array (FPGA) digital electronic integrated circuits (ICs) or other ICs that support partial reconfiguration, a particular FPGA having reconfigurable partitions and primitive variations configurable in each of the reconfigurable partitions, comprises: before writing configuration bitstreams to the FPGA, compiling and storing primitive bitstreams for different primitive functions that can be implemented on the particular FPGA; receiving input in a graphical user interface to connect graphical blocks representing functional logic of an algorithm to implement on the particular FPGA, the graphical blocks relating to reconfigurable logic; automatically determining a subset of the primitive functions comprising particular primitive functions that correspond to the graphical blocks; obtaining, from the digital storage, a subset of the primitive bitstreams that corresponds to the subset of the primitive functions; using partial reconfiguration operations, writing the subset of the p

Abstract: Programming field programmable gate array (FPGA) digital electronic integrated circuits (ICs) or other ICs that support partial reconfiguration, a particular FPGA having reconfigurable partitions and primitive variations configurable in each of the reconfigurable partitions, comprises: before writing configuration bitstreams to the FPGA, compiling and storing primitive bitstreams for different primitive functions that can be implemented on the particular FPGA; receiving input in a graphical user interface to connect graphical blocks representing functional logic of an algorithm to implement on the particular FPGA, the graphical blocks relating to reconfigurable logic; automatically determining a subset of the primitive functions comprising particular primitive functions that correspond to the graphical blocks; obtaining, from the digital storage, a subset of the primitive bitstreams that corresponds to the subset of the primitive functions; using partial reconfiguration operations, writing the subset of the p

Abstract: The present disclosure relates to blended analog-to-digital conversion for digital test and measurement devices. A first analog-to-digital converter (ADC) converts an analog signal into a first digital signal a first sampling rate. A digital filtering component generates a filtered digital signal by processing the first digital signal. An analog low pass filter filters the analog signal to generate a filtered analog signal. A second ADC converts the filtered analog signal into a second digital signal. A digital subtractor circuit subtracts the filtered digital signal from the first digital signal or the second digital signal. A digital adder circuit generates a blended digital signal by processing an output of the digital subtractor circuit and one of the first digital signal or the second digital signal.

Abstract: Systems and methods are provided for blended analog-to-digital conversion for digital test and measurement devices. A first-frequency-domain circuit path is configured to generate a first processed digital signal having high fidelity to an analog signal over a first frequency domain. A second-frequency-domain circuit path is configured to generate a second processed digital signal having high fidelity to the analog signal over a second frequency domain. A blended digital signal is generated using the first processed digital signal and the second processed digital signal. The blended digital signal can have high fidelity to the analog signal over multiple frequency domains.

Abstract: In an embodiment, a method is disclosed providing an improvement in speed and efficiency of programming field programmable gate array (FPGA) digital electronic integrated circuits (ICs) or other ICs that support partial reconfiguration, a particular FPGA having a plurality of reconfigurable partitions and a plurality of primitive variations configurable in each of the reconfigurable partitions, the method comprising: before writing configuration bitstreams to the particular FPGA, compiling and storing, using digital storage, a plurality of primitive bitstreams for a plurality of different primitive functions that can be written to and implemented on the particular FPGA; receiving input in a graphical user interface to select and connect graphical blocks representing functional logic of an algorithm to implement on the particular FPGA, the graphical blocks relating to reconfigurable logic; automatically determining a subset of the primitive functions comprising particular primitive functions that correspond to

Abstract: An optical phased array (100) and a method (200) of forming an optical beam using an optical phased array (100) are disclosed. The optical phased array (100) comprises an optical head (116) for producing an output light beam, a spread spectrum modulation module (112), and a module (114) for controlling the phase of spread-spectrum-modulated light beams. The optical head (116) has a reference surface in the optical head (116) and comprises a number of sub-apertures (130) each for receiving a respective light beam. The reference surface (116) produces a backreflected light signal (126). The spread spectrum modulation module (112) modulates each of the light beams to have a spread spectrum signal for isolating the respective modulated light beam, which is provided to the optical head (116). The module (114) for controlling the phase of the spread-spectrum-modulated light beams is dependent upon the backreflected light signal (126) and the spread spectrum modulation.

Abstract: This invention provides a method and an optical system for sensing and controlling the frequency for a laser with respect to an optical cavity and for sensing and controlling the length difference of interferometer paths in a two beam interferometer. A misalignment is introduced in the incident laser radiation to produce a fundamental mode (TEM00) in the cavity or interferometer and the reflection of a least one higher order mode (TEM01). A split photodetector (10) allows the interference between these two modes to be measured separately by detecting two spatially distinct portions of the single reflected beam. An error signal indicative of the difference between the fundamental mode frequency and the cavity resonant frequency is obtained by substracting the outputs from the two parts of the photodetector.