We describe custom architecture of a small synthesizable soft processor for the next generation of proprietary capacitive angle sensor (CAPSE) developed by CTRL company for space applications. We process data streams from ADCs by custom developed 16-bit processor. The processor is written in platform independent VHDL code. It uses a small Leros (soft processor) control unit and several custom coprocessors including CORDIC, fixed-point fractional multiplier, and adder with barrel shifter optimized for fractional fixed-point arithmetic. We describe architecture of the proposed processor and present the results of developed custom processor mapping to the target FPGA circuit. The complete processor occupies only ∼2100 Logic Elements in target FPGA and complete firmware has less than 220 instructions. For a 10 kHz sampling rate, it requires less than 3 MHz system clock frequency.

A detailed analysis of the crosstalk in the gapped-core current sensor is presented in this paper. The gapped-core current transducer with a magnetic field sensor in the airgap is widely used to measure current in industries and laboratories. We examine the effect of a nearby current-carrying conductor on the performance of the gapped-core transducer, for the first time in this paper. The crosstalk is studied by considering various factors such as angular and linear displacement of the external conductor, core material, and position of the main conductor. A 3D Finite Element Method (FEM) based model is used to analyse the cross talk and results are presented in this paper. This analysis helps the designer to get detailed insight into the effect of the external conductor on the gapped core current transducer.

The new quantum SI opens the route to link the base unit definitions to fundamental constants of nature. In the spirit of the quantum SI, a similar traceability route can be implemented for alternating electrical quantities, such as electrical power. Its implementation is summarized in the present paper along with the main steps about the realization of a quantum-based sampling power standard carried out in the framework of the EMPIR project Quantum Power. A programmable Josephson voltage standard (PJVS) based on a 1-V SNS binary array provides the traceability of the power standard. The PJVS has been integrated into an existing sampling power standard and its main purpose is the real-time calibration of high-precision waveform digitizers using a new synchronous quantum power multiplexer (SQPM). Measurement scenarios and experimental characterization aimed at evaluating the gain and phase errors of the system constituents, and in particular of SQPM, are presented.

Modern drive systems rely in terms of accuracy and robustness on the quality of the used position sensors. For high accuracy applications optical position sensors are dominating the market with a trend towards more magnetic systems as their robustness in the field is superior compared to the optical counterparts. While the sensor itself has a great impact on system accuracy, the used scale or pole wheel is of similar importance when evaluating system architectures. ITK presents in this paper a machine setup for high accuracy, single pole writing machines either for linear or rotary magnetic scales. Baseline for the software architecture is the newly released DIN SPEC 91411 which unifies the nomenclature for magnetic measurement system. In addition the paper focus on a systematic approach to also measure the magnetic accuracy. Furthermore, new developments in write head design are presented as new hard magnetic coatings require higher fields for magnetization.

Calibration of atomic density in vapour cell is very important for high precision quantum metrology and fundamental research. Here we propose to use spin noise spectroscopy(SNS) method for density estimation which would be more reliable than the common density estimation methods based on absorption spectrum or thermodynamic equation. We show our test with different density estimation methods, and show the robustness of SNS method.