The paper describes theoretical design and simulation results of the high precision amplifier for use in metrology especially for measurement of low AC voltage in a wide frequency range. The whole device will be used in process of calibration of common multimeters with AC/DC comparation technique.

 The portable digital multimeters (DMMs) frequently recommended to be used for data acquisition from electromagnetic field meters are the data logging DMMs. In this paper it is shown that it is better to use for this task the DMMs with event logging mode instead of the ones with the data logging mode. The advantages obtained using these DMMs are presented. The performed experimental results pr...

A simple and high-precision current-to-voltage (I/V) converter circuit for multimeters and oscillographs is presented in this paper. The I/V converter measures the electric current with uA and nA selectable ranges in the frequency range from direct current to 1MHz. Circuit technology is also discussed. System Architecture is presented and dual polarity power is designed. Power detector circuit ...

In this work the equivalent resistors of eight regular polygonal and five polyhedral resistive structures are studied experimentally. The structures were constructed using commercial precision resistors of 1.209 kΩ ±0.5 % and the resistances were measured using multimeters available in any physics laboratory. The resistance dependence of the polygonal structures with relation to the vertex numb...

We propose a quantum device that can approximate any projective measurement on a qubit-a quantum "multimeter." The desired measurement basis is selected by the quantum state of a "program register." Two different kinds of programs are considered and in both cases the device is optimized with respect to maximal average fidelity (assuming uniform distribution of measurement bases). Quantum multim...

This paper presents web-based virtual laboratory system for electronic and digital circuit experiments. Through our virtual laboratory, the learners will be capable of learning the concepts and theories related to circuit experiments and how to operate the virtual experimental equipments such as multimeters, function generators, digital oscilloscopes, DC power suppliers and bread board etc. The...