ECE 3235 Electronics II
... 2. Automatic Gain Control (AGC) After performing part one of this experiment, you should be convinced that the output waveform of the Wien Bridge oscillator is somewhat distorted. This is because the circuit poles must be placed just a bit to the right of the imaginary axis for oscillation to build ...
... 2. Automatic Gain Control (AGC) After performing part one of this experiment, you should be convinced that the output waveform of the Wien Bridge oscillator is somewhat distorted. This is because the circuit poles must be placed just a bit to the right of the imaginary axis for oscillation to build ...
PDF
... converter endures increasing problems related to providing appropriate insulation voltages for the voltage transformer. The dimensions and weight of the voltage synchronizing transformer are quite big compared to the minimum power required for the electronic synchronizing steps activation. As it is ...
... converter endures increasing problems related to providing appropriate insulation voltages for the voltage transformer. The dimensions and weight of the voltage synchronizing transformer are quite big compared to the minimum power required for the electronic synchronizing steps activation. As it is ...
UNIT-VII Static Series Compensators
... reactance at any line current up to the rated maximum. In this compensation mode the capacitive impedance is chosen so as to provide the maximum series compensation at rated current, XC = Vcmax/Imax, that the GCSC can vary in the 0 <= XC(γ) <= XC range by controlling the effective capacitor voltage ...
... reactance at any line current up to the rated maximum. In this compensation mode the capacitive impedance is chosen so as to provide the maximum series compensation at rated current, XC = Vcmax/Imax, that the GCSC can vary in the 0 <= XC(γ) <= XC range by controlling the effective capacitor voltage ...
The Ernitec Series 250 is a range of units capable of transmitting
... with BVR-65). This is a compact video transmitter and due to low power consumption can be connected to a built-in BNC plug and powered by a camera. The MVT-610 is fully compatible with all other Ernitec twisted pair equipment. ...
... with BVR-65). This is a compact video transmitter and due to low power consumption can be connected to a built-in BNC plug and powered by a camera. The MVT-610 is fully compatible with all other Ernitec twisted pair equipment. ...
specialtopics_13
... When suppressor operates an arc in gap This arc must quenched as surge pass, or resistor will be destroyed In other cases the gap is not required Arresters vary depending on their voltage class & duty however has: Gaps, coils, valve elements (nonlinear res.) They are stacked in series & he ...
... When suppressor operates an arc in gap This arc must quenched as surge pass, or resistor will be destroyed In other cases the gap is not required Arresters vary depending on their voltage class & duty however has: Gaps, coils, valve elements (nonlinear res.) They are stacked in series & he ...
Unit Test 3 – Industrial Electronics – Question Bank
... chopper is called step down chopper / buck converter. Average output voltage Vo is greater than input voltage Vs ie. Vo > Vs, this chopper is called step up chopper/ boost converter. 3. What is meant by PWM control in dc chopper? In this control method the on time Ton is varied but chopping frequenc ...
... chopper is called step down chopper / buck converter. Average output voltage Vo is greater than input voltage Vs ie. Vo > Vs, this chopper is called step up chopper/ boost converter. 3. What is meant by PWM control in dc chopper? In this control method the on time Ton is varied but chopping frequenc ...
modified_version_3
... inductance. The failure mechanism of HVCC under repetitive rate pulses is rather complicated. The properties of ceramics are the primary element which determine the operation status and lifetime of HVCC. The structure of ceramic chips and the thickness of epoxy coating will influence the heat and st ...
... inductance. The failure mechanism of HVCC under repetitive rate pulses is rather complicated. The properties of ceramics are the primary element which determine the operation status and lifetime of HVCC. The structure of ceramic chips and the thickness of epoxy coating will influence the heat and st ...
ECT1012 Circuit Theory and Field Theory
... For an inductance L, the current waveform lags the voltage waveform by 90o. The instantaneous voltage across the inductor reaches its peak value first, a quarter cycle earlier than the current waveform. In contrast, the current waveform leads the voltage waveform by 90o for the case of a capacitor. ...
... For an inductance L, the current waveform lags the voltage waveform by 90o. The instantaneous voltage across the inductor reaches its peak value first, a quarter cycle earlier than the current waveform. In contrast, the current waveform leads the voltage waveform by 90o for the case of a capacitor. ...
Features: Compliance: Applications Warranty
... The VCSEL laser driver accept differential input data and provide bias and modulation currents for driving a laser. An automatic power-control (APC) feedback loop is incorporated to maintain a constant average optical power. 850nm VCSEL in an eye safe optical subassembly (OSA) mates to the fiber cab ...
... The VCSEL laser driver accept differential input data and provide bias and modulation currents for driving a laser. An automatic power-control (APC) feedback loop is incorporated to maintain a constant average optical power. 850nm VCSEL in an eye safe optical subassembly (OSA) mates to the fiber cab ...
Alternating Current RC Circuits
... other extreme, where the frequency gets large, you probably have no a priori expectations. Plotting the behavior as a function of frequency (see Figure 3), you will find that the amplitude of VC (t) vanishes, while the amplitude of VR (t) goes to Vs , while the phase difference between the applied v ...
... other extreme, where the frequency gets large, you probably have no a priori expectations. Plotting the behavior as a function of frequency (see Figure 3), you will find that the amplitude of VC (t) vanishes, while the amplitude of VR (t) goes to Vs , while the phase difference between the applied v ...
Review Topics for Exam #3
... o if an excitation (stimulus, or independent voltage or current source) is scaled by a constant K, then the response (a given circuit voltage or current) is also scaled by K - a definition of linearity: The portion of a voltage or current somewhere in a circuit due to a specific independent voltage ...
... o if an excitation (stimulus, or independent voltage or current source) is scaled by a constant K, then the response (a given circuit voltage or current) is also scaled by K - a definition of linearity: The portion of a voltage or current somewhere in a circuit due to a specific independent voltage ...
A Frequency Controlled LCL - T Resonant Converter for H
... High frequency resonant converters are widely used in many applications like high voltage (HV) power supplies, induction heating, power factor correction etc. owing to their features of small size, zero voltage switching (ZVS) at above resonant frequency (operating in lagging power factor mode), low ...
... High frequency resonant converters are widely used in many applications like high voltage (HV) power supplies, induction heating, power factor correction etc. owing to their features of small size, zero voltage switching (ZVS) at above resonant frequency (operating in lagging power factor mode), low ...
the oscilloscope
... produced until the signal exceeds a certain selected value, and hence "triggers" the sweep from left to right. After completion of the sweep the beam returns to the left side and waits till the next sweep is triggered. In the auto mode, the sweep runs continuously at a pre-selected rate. In this lab ...
... produced until the signal exceeds a certain selected value, and hence "triggers" the sweep from left to right. After completion of the sweep the beam returns to the left side and waits till the next sweep is triggered. In the auto mode, the sweep runs continuously at a pre-selected rate. In this lab ...
Disturbances generated by locomotives in underground mines
... electromagnetic environment in the mine. Stimulation that has been analyzed may constitute not only a source of disturbances. It can be a potential problem not only in local terms (ie. with a locomotive passing), but also, as it was presented above, can be propagated along tunnels (especially when i ...
... electromagnetic environment in the mine. Stimulation that has been analyzed may constitute not only a source of disturbances. It can be a potential problem not only in local terms (ie. with a locomotive passing), but also, as it was presented above, can be propagated along tunnels (especially when i ...
THE OSCILLOSCOPE OBJECTIVE: To become familiar with the
... produced until the signal exceeds a certain selected value, and hence "triggers" the sweep from left to right. After completion of the sweep the beam returns to the left side and waits till the next sweep is triggered. In the auto mode, the sweep runs continuously at a pre-selected rate. In this lab ...
... produced until the signal exceeds a certain selected value, and hence "triggers" the sweep from left to right. After completion of the sweep the beam returns to the left side and waits till the next sweep is triggered. In the auto mode, the sweep runs continuously at a pre-selected rate. In this lab ...
Lecture 8: Maxwell`s Equations and Electrical Circuits.
... You considered resistors supporting direct current previously in EE 381. For sinusoidal steady state, we will assume here that the resistors are electrically small. That is, their dimensions are much smaller than a wavelength ( c / f ). Inside a conductive material, by Ohm’s law J t E ...
... You considered resistors supporting direct current previously in EE 381. For sinusoidal steady state, we will assume here that the resistors are electrically small. That is, their dimensions are much smaller than a wavelength ( c / f ). Inside a conductive material, by Ohm’s law J t E ...
Cascade Cockcroft–Walton Voltage Multiplier Applied to
... dc applications. However, the major drawback is that a high ripple voltage appears at the output when a low-frequency (50 or 60 Hz) utility source is used. ...
... dc applications. However, the major drawback is that a high ripple voltage appears at the output when a low-frequency (50 or 60 Hz) utility source is used. ...
capacitors and inductors
... varying resistance (reactance) to AC. As frequency increases capacitive reactance decreases. The formula for capacitive reactance is as follows: Xc = 1/(6.28x F x C) Xc is Capacitive reactance, in ohms. 6.28 is actually “2 x pi(3.14159…)”. F is frequency of the signal, in Hertz. C is the capacitance ...
... varying resistance (reactance) to AC. As frequency increases capacitive reactance decreases. The formula for capacitive reactance is as follows: Xc = 1/(6.28x F x C) Xc is Capacitive reactance, in ohms. 6.28 is actually “2 x pi(3.14159…)”. F is frequency of the signal, in Hertz. C is the capacitance ...
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.""