J. Sanz-Robinson, W. Rieutort-Louis, Y. Hu, L. Huang, N. Verma, S. Wagner, J.C. Sturm, "Hybrid Amorphous/Nanocrystalline Silicon Schottky Diodes for High Frequency Rectification", IEEE EDL, Vol 35, pp. 425-427 (APR 2014).
... Our goal is to use the diodes as rectifiers for AC-to-DC voltage conversion at high frequencies. To evaluate their performance we built a half-wave rectifier and measured the DC output voltage (Vout _DC ), while varying the frequency of an input voltage source (Vin ) with a 4 V peak amplitude [Fig. ...
... Our goal is to use the diodes as rectifiers for AC-to-DC voltage conversion at high frequencies. To evaluate their performance we built a half-wave rectifier and measured the DC output voltage (Vout _DC ), while varying the frequency of an input voltage source (Vin ) with a 4 V peak amplitude [Fig. ...
EIS of Organic Coatings and Paints
... "I’m an experienced polymer chemist. I’m trying to use Electrochemical Impedance Spectroscopy (EIS) to predict the corrosion resistant properties of paints. I’ve recorded many EIS spectra on painted metal samples immersed in electrolyte. All (or most) of these spectra look the same, regardless of th ...
... "I’m an experienced polymer chemist. I’m trying to use Electrochemical Impedance Spectroscopy (EIS) to predict the corrosion resistant properties of paints. I’ve recorded many EIS spectra on painted metal samples immersed in electrolyte. All (or most) of these spectra look the same, regardless of th ...
Line-type radar modulators - Naval Postgraduate School
... this treatise to discuss magnetrons per se , but as these devices present a non-linear load to the pulser and therefore influence pulser design to a great extent, it is necessary to consider them from that point of view. Consequently, it should be borne in mind that this is the type load into which ...
... this treatise to discuss magnetrons per se , but as these devices present a non-linear load to the pulser and therefore influence pulser design to a great extent, it is necessary to consider them from that point of view. Consequently, it should be borne in mind that this is the type load into which ...
AC Theory - Department of Electrical Engineering
... It is also usual to draw the Phasor diagram using the rms value A of the sinusoidal waveform, rather than with the peak value Am. This is shown on an enlarged diagram. Thus unless otherwise specified it is the rms value that is drawn on a phasor diagram. It should be noted that the values on the pha ...
... It is also usual to draw the Phasor diagram using the rms value A of the sinusoidal waveform, rather than with the peak value Am. This is shown on an enlarged diagram. Thus unless otherwise specified it is the rms value that is drawn on a phasor diagram. It should be noted that the values on the pha ...
Alternating Current Circuits
... radians or 90, the current is said to lead the voltage by 90 or lead the voltage by a quarter cycle. (Remember that a full cycle is 360 - a “complete trip” around a circle.) We can also say that the voltage lags the current by 90 or lags the current by a quarter cycle. V For a capacitive load th ...
... radians or 90, the current is said to lead the voltage by 90 or lead the voltage by a quarter cycle. (Remember that a full cycle is 360 - a “complete trip” around a circle.) We can also say that the voltage lags the current by 90 or lags the current by a quarter cycle. V For a capacitive load th ...
21111014 Draft 2 PN-3-4963
... The logic function of the generator and the receiver is beyond the scope of this Standard, and therefore is not defined. 4.1 Unit load characteristics In order that the current required from a generator in the active state be limited to a practical value, the loading effect of any combination of rec ...
... The logic function of the generator and the receiver is beyond the scope of this Standard, and therefore is not defined. 4.1 Unit load characteristics In order that the current required from a generator in the active state be limited to a practical value, the loading effect of any combination of rec ...
Application Note 1724 LM5015 Isolated Two-Switch DC
... Once the proper setup has been established, full load can be applied. A final check of efficiency is suggested to confirm that the unit is operating properly. Efficiency significantly lower than 80% at full load indicates a problem. The evaluation board can be synchronized to an external clock of fa ...
... Once the proper setup has been established, full load can be applied. A final check of efficiency is suggested to confirm that the unit is operating properly. Efficiency significantly lower than 80% at full load indicates a problem. The evaluation board can be synchronized to an external clock of fa ...
Design Considerations on Current-Mode and Voltage-Mode
... Summing this signal to the input of the voltage regulator, which has a proportional behavior at the switching frequency, we obtain the desired corrected reference signal IR+∆IR without need of any synchronization. The basic scheme of the adopted controller is shown in Fig.5. Note that the negative s ...
... Summing this signal to the input of the voltage regulator, which has a proportional behavior at the switching frequency, we obtain the desired corrected reference signal IR+∆IR without need of any synchronization. The basic scheme of the adopted controller is shown in Fig.5. Note that the negative s ...
Simple MOSFET-Based High-Voltage Nanosecond Pulse Circuit
... Fig. 5. Prototype with ground plane and solder mount or surfboard PCBs—transmission line construction. ...
... Fig. 5. Prototype with ground plane and solder mount or surfboard PCBs—transmission line construction. ...
Lecture 7: Hybrid Transistor Model for small AC :
... In this model we assume the transistor is biased on properly and do not show the biasing circuit. Since a transistor has only 3 legs, one of the terminals is common between the input and output. There are 4 variables in the problem, Ii, Vi, Io, and Vo. ...
... In this model we assume the transistor is biased on properly and do not show the biasing circuit. Since a transistor has only 3 legs, one of the terminals is common between the input and output. There are 4 variables in the problem, Ii, Vi, Io, and Vo. ...
5164 - SK Engineering Academy
... 14. A 200volt ,50Hz source supplies a series RC circuit R=30ohms and C=79µF.Find a)the impedance, b)the current, c)power factor d)power a) Z = (R2+XC2) = (302+402) = 50 ohms Xc = 1/2πfC = 40Ω b) I = E/Z = 200/50 = 4A c) p.f = cos Ф = R/Z = 30/50 = 0.6 (leading capacitive current) d) Power = EI cos ...
... 14. A 200volt ,50Hz source supplies a series RC circuit R=30ohms and C=79µF.Find a)the impedance, b)the current, c)power factor d)power a) Z = (R2+XC2) = (302+402) = 50 ohms Xc = 1/2πfC = 40Ω b) I = E/Z = 200/50 = 4A c) p.f = cos Ф = R/Z = 30/50 = 0.6 (leading capacitive current) d) Power = EI cos ...
Standing wave ratio
In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave's amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line.The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced ""viswar""). For example, the VSWR value 1.2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1.2 times that of the minimum AC voltage along that line. The SWR can as well be defined as the ratio of the maximum amplitude to minimum amplitude of the transmission line's currents, electric field strength, or the magnetic field strength. Neglecting transmission line loss, these ratios are identical.The power standing wave ratio (PSWR) is defined as the square of the VSWR, however this terminology has no physical relation to actual powers involved in transmission.The SWR can be measured with an instrument called an SWR meter. Since SWR is defined relative to the transmission line's characteristic impedance, the SWR meter must be constructed for that impedance; in practice most transmission lines used in these applications are coaxial cables with an impedance of either 50 or 75 ohms. Checking the SWR is a standard procedure in a radio station, for instance, to verify impedance matching of the antenna to the transmission line (and transmitter). Unlike connecting an impedance analyzer (or ""impedance bridge"") directly to the antenna (or other load), the SWR does not measure the actual impedance of the load, but quantifies the magnitude of the impedance mismatch just performing a measurement on the transmitter side of the transmission line.