The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Heat transfer phenomena in electronic nanostructures are supposed not to obey the classic Fourier heat transfer theory. Thus, in order to verify this hypothesis experimentally, a set of MEMS nanostructures was designed and manufactured. These structures contain a number of cavities filled with different materials, including various dielectrics, such as silicon dioxide and the silicon nitride, or air...
Analog front-end for precise temperature measurement of a human body has been presented. The discussed analog front-end (AFE) contains a new temperature calibration technique based on on-chip resistor. The described calibration method allows to obtain very high accuracy, even 0.1 °C, in very wide range of an operating temperature of an integrated circuit. The AFE consists of a bandgap current reference,...
The general structure of interaction of multi-functional sensors with simultaneous temperature and humidity measurement within cyber-physical systems are proposed. The substitution method of active resistance measurement was used to implementation of nanostructured sensors into measurement system.
In an effort to refine the value of the Boltzmann constant (k), we made thermodynamic temperature measurements of k using a Johnson noise thermometry (JNT) system, currently under development, using a quantum voltage noise source (QVNS). The JNT system measures the power spectrum density (PSD) of a sensor resistor using the PSD of a QVNS as a reference. k is then obtained using the Johnson-Nyquist...
High-voltage dc (HVDC) reference divider is essential for on-site calibration of HVDC measuring systems. In this paper the effect of the change of temperature, electromagnetic environment of converter station and other factors on the ratio accuracy of reference divider is analyzed. The influence of high voltage connection cables, which apply high voltage to the reference divider and calibrated divider,...
We have been developing a Johnson noise thermometer (JNT) at NMIJ toward redefinition of the Boltzmann constant k. The JNT system measure thermal noise power of a resistor installed at the triple point of water and power of a reference signal generated with a Quantum Voltage Noise Source (QVNS) alternatively in order to obtain k precisely. Relative differences between experimentally obtained k and...
An overview is presented on precision high-ohmic resistance measurements for values of 100 MΩ and above. The two main measurement techniques in this resistance range are discussed, the current integration technique and the adapted Wheatstone bridge. The quality of high-ohmic resistance standards, especially their time constants, temperature and voltage dependence, often is limiting the final uncertainty...
The load effect of the resistor should be paid great attention for the precise measurement. Here a high accurate resistance voltage divider (RVD) used to precisely measure the load effect of the resistor is provided. A self-calibrated standard resistor at 100Ω with zero load effect is employed as one arm of the bridge, and several stable resistors with the same temperature coefficient and structure...
This paper describes the selection and characterization of resistors for a 1000 kV HVDC divider. One thousand 10 MΩ resistors will be connected in series in the final design. Due to the large number of resistors only a randomly selected set has been characterized. The measured temperature and voltage coefficients of the resistors are around 1 µΩ/Ω/K and −10 µΩ/Ω/kV respectively, which make them very...
Wire-mesh sensors are flow imaging devices which are able to generate images of cross-sectional phase distribution at high spatial and temporal resolution. In this paper, we introduce a novel general concept of advanced wire-mesh sensors for the measurement of other physical quantity than phase fractions. The main idea is to provide the wire crossings with miniature transducers which convert a physical...
This paper presents a low-cost, high-performance sensor interface for resistive platinum temperature sensors with a long connection cable. The interface design is based on the use of a relaxation oscillator. The effects of interference and parasitic elements are reduced by applying some classical and new measurement techniques in the sensor interface design. The sensor is supplied with a DC excitation...
Due to the sensitivity of the piezoelectric layer in surface acoustic wave (SAW) resonators to temperature, a method of achieving device stability as a function of temperature is required. This work presents the design, modeling and characterization of integrated dual-serpentine polysilicon resistors as a method of temperature control for CMOS SAW resonators. The design employs the oven control temperature...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.