![]() Please leave a comment below if you have any questions. May I recommend you print this note and check things off as you have master the topics. Know that it will take some time for the material to sink in. As the inductor is "turned off" it will act as a constant current source and do whatever is necessary to maintain the same current before and after the transition.Ĥ) Please search "transistor characteristic curves." Here you will find that a transistor appears to operate as an acceptable constant current source. AC stands for Alternating Current, meaning voltage or current that changes polarity or direction, respectively, over time. Such a device would demand infinite current (again, not possible in this universe).ģ) Please search "inductor kickback." Here you will find than an inductor acts as a constant current source for a limited amount of time. Note that there is no such thing as a perfect constant voltage source. This report provides an understanding of the terms and definitions of low dropout (LDO) voltage regulators, and describes fundamental concepts including. The difference in charge between higher potential and lower potential is called a voltage or potential difference. One point has a higher potential and the other points have lower potential. To make one you would need a device that could produce an infinite voltage (not possible).Ģ) Please search "Thevenin Norton Equivalent." Here you will find that a voltage source with series resistance can be modeled as a current source with parallel resistor. We can define voltage as the amount of potential energy between two points in a circuit. volt, unit of electrical potential, potential difference and electromotive force in the metrekilogramsecond system (SI) it is equal to the difference in potential between two points in a conductor carrying one ampere current when the power dissipated between the points is one watt. To my knowledge there are no perfect constant current sources. It will take on whatever voltage is necessary to do so including both positive and negative voltages. I'll give you a few examples to consider:ġ) The current source is a mathematical construct that maintains a constant current. Voltage always occurs when the charges are separated from each other. The current source is a different animal. Voltage U is the very cause that makes electric current I flow. With more current and a fixed voltage there will be more power. ![]() ![]() ![]() As you stated as the resistance is decreased more current flows. Examples include a battery or wall outlet. To students of electronics, Ohms Law (E IR) is as fundamentally important as Einsteins Relativity equation (E mc²) is to physicists. Ohms Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. In my opinion the voltage source is relatively straightforward. What is Ohm’s Law Electrical, Fundamentals. CAUTION - this is an answer from an electrical engineer. ![]()
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