eet 307 power electronics 2005-2006
... Vout V and out transfer functions are both dependent on Ein and require time therefore before Vc Ein a response can be made. Voltage Feedforward systems in which the ramp slope is not constant but varies dependent on the input voltage can eliminate this. ...
... Vout V and out transfer functions are both dependent on Ein and require time therefore before Vc Ein a response can be made. Voltage Feedforward systems in which the ramp slope is not constant but varies dependent on the input voltage can eliminate this. ...
LOOP INPUT CIRCUITS
... • The loop antenna is an inductive in nature. • The loop output is not generally used directly as an input to the receiver. • A variety of circuits is used at the input of direction-finding receivers to obtain a voltage which larger than the loop voltage. • The basic elements of a few of these circu ...
... • The loop antenna is an inductive in nature. • The loop output is not generally used directly as an input to the receiver. • A variety of circuits is used at the input of direction-finding receivers to obtain a voltage which larger than the loop voltage. • The basic elements of a few of these circu ...
Adjustable inverting negative output current mode PWM regulators
... R2), the maximum LX current limit can be lowered according the diagram showed in Figure 11. When SHDN input is low, the total current consumption is reduced to 10µA. ...
... R2), the maximum LX current limit can be lowered according the diagram showed in Figure 11. When SHDN input is low, the total current consumption is reduced to 10µA. ...
Resistance and Ohms Law Investigation Period/Names
... B. Discuss these variables with another Group. Do you agree with what each represents? Make any corrections if needed. ...
... B. Discuss these variables with another Group. Do you agree with what each represents? Make any corrections if needed. ...
DT002_1 Review Questions
... 13. State how the ripple voltage may be reduced in the output from a power supply unit. 14. Smoothing capacitors usually have relatively large values. (a) State the type of capacitor that is used in order to provide such large values. (b) Identify an important characteristic of this type of capacito ...
... 13. State how the ripple voltage may be reduced in the output from a power supply unit. 14. Smoothing capacitors usually have relatively large values. (a) State the type of capacitor that is used in order to provide such large values. (b) Identify an important characteristic of this type of capacito ...
Problem Set 5
... A Wheatstone bridge, using a 10V emf source has the following components in its arms: R1 = 100; R2 = 200 and R3 = 5k. R4 is unknown. (i) Calculate the value of R4. ...
... A Wheatstone bridge, using a 10V emf source has the following components in its arms: R1 = 100; R2 = 200 and R3 = 5k. R4 is unknown. (i) Calculate the value of R4. ...
Electric current
... must be placed ACROSS the device you want to measure. That way you can measure the CHANGE on either side of the device. Voltmeter is drawn ACROSS the resisto Since the ammeter measures the current or FLOW it must be placed in such a way as the charges go THROUGH the device. ...
... must be placed ACROSS the device you want to measure. That way you can measure the CHANGE on either side of the device. Voltmeter is drawn ACROSS the resisto Since the ammeter measures the current or FLOW it must be placed in such a way as the charges go THROUGH the device. ...
PEPETOOLS INTELLIGENT POWER SUPPLY
... Engineered to fulfill the needs of jewelers and plating professionals. This state of the art device is built upon on transformer-less PC Architecture. The software was coded specifically for the hardware to create a system with intuitive and easily configurable programming* No other ...
... Engineered to fulfill the needs of jewelers and plating professionals. This state of the art device is built upon on transformer-less PC Architecture. The software was coded specifically for the hardware to create a system with intuitive and easily configurable programming* No other ...
Chapter 17 Alternating Currents
... (2) Rb used to limit current Ib so as to not exceed maximum allowable for transistor (increase of Ib leads to an increasing p.d. across Rb reducing Vbe and Ib). (3) Rc is a load resistor - variations in the collector current Ic produce corresponding variations in the p.d. across Rc. (b) Typical inpu ...
... (2) Rb used to limit current Ib so as to not exceed maximum allowable for transistor (increase of Ib leads to an increasing p.d. across Rb reducing Vbe and Ib). (3) Rc is a load resistor - variations in the collector current Ic produce corresponding variations in the p.d. across Rc. (b) Typical inpu ...
Ohm`s Law
... The 6Ω and the 4Ω resistors are in series with each other, the branch they are on is parallel to the 1Ω resistor. The parallel branches between B & D are in series with the 2Ω resistor. The 5Ω resistor is on a branch that is parallel with the BC parallel group and its series 2Ω buddy. The total resi ...
... The 6Ω and the 4Ω resistors are in series with each other, the branch they are on is parallel to the 1Ω resistor. The parallel branches between B & D are in series with the 2Ω resistor. The 5Ω resistor is on a branch that is parallel with the BC parallel group and its series 2Ω buddy. The total resi ...
STEVAL-ISA006V1
... The output of the converter is not isolated from the input. For this reason the reference ground is common for an input and output connection terminal. The input capacitor C1 is charged from the mains by single rectification consisting of diodes D1 and D2. Two diodes in series are used for EMI reaso ...
... The output of the converter is not isolated from the input. For this reason the reference ground is common for an input and output connection terminal. The input capacitor C1 is charged from the mains by single rectification consisting of diodes D1 and D2. Two diodes in series are used for EMI reaso ...
Inductors and AC
... is not frequency sensitive as is XL, but it does produce a voltage drop which appears as a part of VL. Furthermore RINT does not produce a phase change (as does XL) and can give a distorted calculation of circuit phase angle. The greater R INT the greater the error in phase angle. In fact, the “qual ...
... is not frequency sensitive as is XL, but it does produce a voltage drop which appears as a part of VL. Furthermore RINT does not produce a phase change (as does XL) and can give a distorted calculation of circuit phase angle. The greater R INT the greater the error in phase angle. In fact, the “qual ...
OHM`S LAW - Westminster College
... voltage, and resistance was discovered by Georg Simon Ohm. The relationship and the unit of electrical resistance were both named for him to commemorate this contribution to physics. One statement of Ohm’s law is that the current through a resistor is proportional to the voltage across the resistor. ...
... voltage, and resistance was discovered by Georg Simon Ohm. The relationship and the unit of electrical resistance were both named for him to commemorate this contribution to physics. One statement of Ohm’s law is that the current through a resistor is proportional to the voltage across the resistor. ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.