Zener diodes are designed to have a specific reverse voltage
... One method of obtaining a split supply from a non center tapped transformer, using zeners . This method may be a convenient solution in some applications but bare in mind that this will be suitable for relatively Low-Current circuits only. ...
... One method of obtaining a split supply from a non center tapped transformer, using zeners . This method may be a convenient solution in some applications but bare in mind that this will be suitable for relatively Low-Current circuits only. ...
As we discussed earlier capacitors and coils resist the flow
... This is read as impedance equal to the square root of “R” squared times “X” squared. “X” is found by combining XC with XL. Lets say we have an capacitive reactance of –j300 and an inductive reactance of +j400. When combined they would equal +j100. Lets say our circuit has 150 ohms of resistance. Pla ...
... This is read as impedance equal to the square root of “R” squared times “X” squared. “X” is found by combining XC with XL. Lets say we have an capacitive reactance of –j300 and an inductive reactance of +j400. When combined they would equal +j100. Lets say our circuit has 150 ohms of resistance. Pla ...
Wireless course Part 3 – Radio Antenna Theory v1
... carry the signal to and from the radio and to and from the antenna. A matching unit can be an antenna tuner, a series matching section, or one of several different kinds of matching circuits at the feed-point. ...
... carry the signal to and from the radio and to and from the antenna. A matching unit can be an antenna tuner, a series matching section, or one of several different kinds of matching circuits at the feed-point. ...
Synchronous Machines
... is supplied from the exciter via two slip-rings, while the armature current is directly supplied to the load. This type is employed universally since very high power can be delivered. Unless otherwise stated, the subsequent discussion refers specifically to rotating-field type synchronous machines. ...
... is supplied from the exciter via two slip-rings, while the armature current is directly supplied to the load. This type is employed universally since very high power can be delivered. Unless otherwise stated, the subsequent discussion refers specifically to rotating-field type synchronous machines. ...
docx - Seattle Central College
... resistor values you choose. Is it better to choose high values, or low ones? There are disadvantages on both sides of the spectrum. If very low values are chosen, large currents flow through the divider, which loads the power supply. If very high values are chosen, then the center node doesn’t maint ...
... resistor values you choose. Is it better to choose high values, or low ones? There are disadvantages on both sides of the spectrum. If very low values are chosen, large currents flow through the divider, which loads the power supply. If very high values are chosen, then the center node doesn’t maint ...
Paper Title (use style: paper title)
... each pulse using this last setup is 581 µJ, the highest of any setup tested. The explanation for this rise time improvement and overshoot may lay in the transmission-line nature of the Marx generator for these pulses. The transistors and connections introduce parasitic inductances, which in combina ...
... each pulse using this last setup is 581 µJ, the highest of any setup tested. The explanation for this rise time improvement and overshoot may lay in the transmission-line nature of the Marx generator for these pulses. The transistors and connections introduce parasitic inductances, which in combina ...
an enhanced voltage sag compensation scheme for dynamic
... voltage while improving the overall sag compensation time. An analytical study shows that the proposed method significantly increases the DVR sag support time (more than 50%) compared with the existing phase jump compensation methods. This enhancement can also be seen as a considerable reduction in ...
... voltage while improving the overall sag compensation time. An analytical study shows that the proposed method significantly increases the DVR sag support time (more than 50%) compared with the existing phase jump compensation methods. This enhancement can also be seen as a considerable reduction in ...
Kirchhoff`s Laws in Dynamic Circuits
... The circuit in Example 3 is an example of an “ac circuit”. Let’s talk about ac circuits. AC Circuits AC circuits are electric circuits in which • The voltages of all independent voltage sources are sinusoidal functions of time. • The currents of all independent current sources are sinusoidal functio ...
... The circuit in Example 3 is an example of an “ac circuit”. Let’s talk about ac circuits. AC Circuits AC circuits are electric circuits in which • The voltages of all independent voltage sources are sinusoidal functions of time. • The currents of all independent current sources are sinusoidal functio ...
... is varied in proportion to the amplitude of a sine wave evaluated at the centre of the same pulse. The distortion factor and lower order harmonics are reduced significantly. The gating signals are generated by comparing a sinusoidal reference signal with a triangular carrier wave of frequency Fc.The ...
SWITCHED CAPACITOR FILTER DESIGN SIMULATION capacitor
... a. The transfer of SC circuits depends not on capacitor values, but on the ratios of them. These ratios can be substantially more accurate than the capacitor values. b. A clock frequency signal, which is needed for SC circuit operation, can be used for their tuning. c. SC circuits do not require res ...
... a. The transfer of SC circuits depends not on capacitor values, but on the ratios of them. These ratios can be substantially more accurate than the capacitor values. b. A clock frequency signal, which is needed for SC circuit operation, can be used for their tuning. c. SC circuits do not require res ...
Tech Notes - Variable capacitors
... same shaft. The fourth one above has a five to one reduction drive connected between the capacitor and the tuning knob to make tuning easier. Simple radio receivers will have a “dial drum” connected to a small diameter shaft to achieve the same aim. The most common form of mechanically controlled va ...
... same shaft. The fourth one above has a five to one reduction drive connected between the capacitor and the tuning knob to make tuning easier. Simple radio receivers will have a “dial drum” connected to a small diameter shaft to achieve the same aim. The most common form of mechanically controlled va ...
NEX 24 kV - Matelec Group
... The switching devices are of the vacuum withdrawable type. NEX design takes into account three categories of users requirements: b reliability v type testing was carried out for each performance level in the NEX range, v maintenance limited to simple, routine operating checks and cleaning, and greas ...
... The switching devices are of the vacuum withdrawable type. NEX design takes into account three categories of users requirements: b reliability v type testing was carried out for each performance level in the NEX range, v maintenance limited to simple, routine operating checks and cleaning, and greas ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... the major problem we dealt here is power sag. Power distribution system should provide their customers with uninterrupted power supply with smooth sinusoidal voltage at contracted magnitude level and frequency. Mostly non linear loads affect the quality of power supplies as a result purity of wavefo ...
... the major problem we dealt here is power sag. Power distribution system should provide their customers with uninterrupted power supply with smooth sinusoidal voltage at contracted magnitude level and frequency. Mostly non linear loads affect the quality of power supplies as a result purity of wavefo ...
V1.0 CDI PSU Module - Rae
... This picture shows a CX500 CDI stator as an example – the two troublesome coils are the wider ones at the top and bottom of the picture, the bottom with a metal cover over it and the top has a bit of the cap chipped off. These coils contain approximately 4000 turns of very fine wire between them wh ...
... This picture shows a CX500 CDI stator as an example – the two troublesome coils are the wider ones at the top and bottom of the picture, the bottom with a metal cover over it and the top has a bit of the cap chipped off. These coils contain approximately 4000 turns of very fine wire between them wh ...
A Novel Multi-Cell DC-AC Converter for Applications in
... series arrangement also the inverter stages can be realized in the same semiconductor technology as the isolation stages (application of low voltage devices). The isolation stage is implemented using a capacitively coupled half bridge converter operated in a constant frequency series resonant mode ( ...
... series arrangement also the inverter stages can be realized in the same semiconductor technology as the isolation stages (application of low voltage devices). The isolation stage is implemented using a capacitively coupled half bridge converter operated in a constant frequency series resonant mode ( ...
Comparative Study and Design Analysis of Several Pulse Width
... RPWM, its output harmonic spectra dispersed and continuously distributed. Hence the acoustic noise, mechanical vibration and harmonic spectra can be greatly reduced. Pulse width modulation technique is the used most widely or controlling the modulation depth of inverter. The most common such Power i ...
... RPWM, its output harmonic spectra dispersed and continuously distributed. Hence the acoustic noise, mechanical vibration and harmonic spectra can be greatly reduced. Pulse width modulation technique is the used most widely or controlling the modulation depth of inverter. The most common such Power i ...
Data Sheet (current)
... In monostable mode, the timer operates like a one-shot generator. The external capacitor is initially held discharged by a transistor inside the timer, as shown in Figure 4. Figure 4. Application schematic ...
... In monostable mode, the timer operates like a one-shot generator. The external capacitor is initially held discharged by a transistor inside the timer, as shown in Figure 4. Figure 4. Application schematic ...
Considering Instantaneous Voltage Drop Versus Sustained Voltage
... comparison thereby ensuring correct operation of sensitive loads. 6.0 When to Consider Evaluating IVD or SVD Instantaneous Voltage Dip (Why it is normally a primary consideration for motor starting systems) • Motor starting is recognized as a complete system performance issue with IVD considered th ...
... comparison thereby ensuring correct operation of sensitive loads. 6.0 When to Consider Evaluating IVD or SVD Instantaneous Voltage Dip (Why it is normally a primary consideration for motor starting systems) • Motor starting is recognized as a complete system performance issue with IVD considered th ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""