John H. Scofield, Rev. Sci. Instrum. 58
... fluctuations reflect the dynamics of the physical systems to which the conduction processes are coupled. For instance, resistance fluctuations of Sn films just above their superconducting transition reflect the dynamics of heat flow [1]. It has been suggested [2] and verified [3] that resistance flu ...
... fluctuations reflect the dynamics of the physical systems to which the conduction processes are coupled. For instance, resistance fluctuations of Sn films just above their superconducting transition reflect the dynamics of heat flow [1]. It has been suggested [2] and verified [3] that resistance flu ...
Analsysis of CT and Clamp-on Response to Motor Starting Waveform
... For a fixed power system frequency, the decay characteristics of a given system are given in a number of different ways in different references. For example, they can be expressed as: power factor, time constant (), decay parameter ( = 1/), Halving time (T1/2), and X/R ratio. To aid comparison of ...
... For a fixed power system frequency, the decay characteristics of a given system are given in a number of different ways in different references. For example, they can be expressed as: power factor, time constant (), decay parameter ( = 1/), Halving time (T1/2), and X/R ratio. To aid comparison of ...
Chapter 4 - UniMAP Portal
... Build-up of steady- state oscillations The unity gain condition must be met for oscillation to be sustained In practice, for oscillation to begin, the voltage gain around the positive feedback loop must be greater than 1 so that the amplitude of the output can build up to the desired value. Bui ...
... Build-up of steady- state oscillations The unity gain condition must be met for oscillation to be sustained In practice, for oscillation to begin, the voltage gain around the positive feedback loop must be greater than 1 so that the amplitude of the output can build up to the desired value. Bui ...
Frequency-selective MEMS for miniaturized low
... advantages of micromechanical filters is that because of their tiny size and zero dc power dissipation, many of them (perhaps hundreds or thousands) can be fabricated onto a smaller area than occupied by a single one of today’s macroscopic filters. Thus, rather than use a single tunable filter to se ...
... advantages of micromechanical filters is that because of their tiny size and zero dc power dissipation, many of them (perhaps hundreds or thousands) can be fabricated onto a smaller area than occupied by a single one of today’s macroscopic filters. Thus, rather than use a single tunable filter to se ...
Implementation of Bioelectric Impedance Measurement
... Cell constituting the human organ consists of ICF and ECF that behave as electrical conductors, and cell membranes that act as electrical condensers and are regarded as imperfect reactive elements [20]. BI of the human tissue is measured differently depending on the frequency of the current to be ap ...
... Cell constituting the human organ consists of ICF and ECF that behave as electrical conductors, and cell membranes that act as electrical condensers and are regarded as imperfect reactive elements [20]. BI of the human tissue is measured differently depending on the frequency of the current to be ap ...
Oscillator
... Build-up of steady- state oscillations The unity gain condition must be met for oscillation to be sustained In practice, for oscillation to begin, the voltage gain around the positive feedback loop must be greater than 1 so that the amplitude of the output can build up to the desired value. Bui ...
... Build-up of steady- state oscillations The unity gain condition must be met for oscillation to be sustained In practice, for oscillation to begin, the voltage gain around the positive feedback loop must be greater than 1 so that the amplitude of the output can build up to the desired value. Bui ...
FERROMAGNETIC COILS FOR WIRELESS POWER TRANSFER
... electric energy transfer principles were used and tested, but the most developed by now is the magnetic resonant coil coupling [1; 2]. The system using this principle typically consists of four coils referred to as driving, transmitting, receiving and load coils [1]. The driving coil and transmittin ...
... electric energy transfer principles were used and tested, but the most developed by now is the magnetic resonant coil coupling [1; 2]. The system using this principle typically consists of four coils referred to as driving, transmitting, receiving and load coils [1]. The driving coil and transmittin ...
4 Surge Mitigation Functions
... December 2002, chapter 13: Filters. For frequency filtering to be effective there must be little or no overlap of the service and surge spectrum. Figure 6 shows the Fast Fourier Transform (FFT) spectrum obtained from 1.2/50 and 10/1000 impulses of unity amplitude. The “knee” of these particular spec ...
... December 2002, chapter 13: Filters. For frequency filtering to be effective there must be little or no overlap of the service and surge spectrum. Figure 6 shows the Fast Fourier Transform (FFT) spectrum obtained from 1.2/50 and 10/1000 impulses of unity amplitude. The “knee” of these particular spec ...
Engineering Bulletin #43 VFD Application
... Tuned Trap Filters: Tuned trap filters are designed to shunt unwanted harmonic currents to the ground. Due to its 300 Hz signal frequency it is possible to import a relatively small harmonic current into the line. The systems reduce overall harmonic distortion, but they are tuned to shunt only one s ...
... Tuned Trap Filters: Tuned trap filters are designed to shunt unwanted harmonic currents to the ground. Due to its 300 Hz signal frequency it is possible to import a relatively small harmonic current into the line. The systems reduce overall harmonic distortion, but they are tuned to shunt only one s ...
Chirp spectrum
The spectrum of a chirp pulse describes its characteristics in terms of its frequency components. This frequency-domain representation is an alternative to the more familiar time-domain waveform, and the two versions are mathematically related by the Fourier transform. The spectrum is of particular interest when pulses are subject to signal processing. For example, when a chirp pulse is compressed by its matched filter, the resulting waveform contains not only a main narrow pulse but, also, a variety of unwanted artifacts many of which are directly attributable to features in the chirp's spectral characteristics. The simplest way to derive the spectrum of a chirp, now computers are widely available, is to sample the time-domain waveform at a frequency well above the Nyquist limit and call up an FFT algorithm to obtain the desired result. As this approach was not an option for the early designers, they resorted to analytic analysis, where possible, or to graphical or approximation methods, otherwise. These early methods still remain helpful, however, as they give additional insight into the behavior and properties of chirps.