By Cyrielle Marjolaine. Power. Publised at Tuesday, December 19th 2017, 11:49:21 AM. Linear regulators are simple voltage regulator circuits commonly used in electronics. This paper briefly discusses how linear regulators work, their advantages and disadvantages, variations on the linear regulator, and important datasheet parameters.
By Alix Loane. Circuit. Published at Tuesday, December 26th 2017, 09:18:43 AM. An inductor is a device that stores energy in the form of current. The most common form of inductors is a wire wound into a coil. The magnetic field generated by the wire creates a counter-acting electric field which impedes changes to the current.
By Valentine Sybille. Motor. Published at Tuesday, December 26th 2017, 09:08:58 AM. If one changes the power supply voltage, then a new family of speed-torque curves result. As an example, if the power supply voltage is doubled then a new curve is generated; the curve now has twice the torque at any given speed in region 2. Since power equals torque times speed, the motor now generates twice as much power as well.
By Bertille Solange. Circuit. Published at Tuesday, December 26th 2017, 09:04:42 AM. In some circuits, there are virtual grounds, which are nodes at the same voltage as ground, but are not connected to a power supply. When current flows into the virtual ground, the voltage at the virtual ground may change relative to the real ground, and the consequences of this situation must be analyzed carefully.
By Bertille Solange. Circuit. Published at Tuesday, December 26th 2017, 07:58:11 AM. An electric current is defined as free flow of electrons and the motivating force behind that free flow of electrons is called Voltage. Voltage is the measurement of potential energy that would move the electrons between two points. Voltage is the push that the electrons require to move within a circuit. Voltage is measured by Volt and Current is measured by Ampere.
By Charlotte Myriam. Amplifier. Published at Tuesday, December 26th 2017, 07:53:55 AM. In a class B amplifier, no DC voltage is used to bias the transistors, so for the output transistors to start to conduct each half of the waveform, both positive and negative, they need the base-emitter voltage Vbe to be greater than the 0.7v required for a bipolar transistor to start conducting.
By Cyrielle Marjolaine. Diagram. Published at Tuesday, December 26th 2017, 07:36:43 AM. Several different resistors are used on Digilent boards. Some are used to limit LED current, and some are used on inputs (like the button and switch circuits) to both limit the currents flowing to the main chip, and to help protect against electrostatic discharge (or ESD – more on this topic later). The resistors on the Digilent boards, like most resistors used in digital systems, are physically small because they will not encounter large voltages or currents. For these smaller resistors, the resistor value in Ohms is printed in microscopic numbers on the resistor body, not visible to the naked eye.
By Charlotte Myriam. Motor. Published at Tuesday, December 26th 2017, 07:36:40 AM. The drive is a current source in the constant torque region and adds no additional phase lag. In the constant power region however, the drive is a voltage source so it introduces an additional 90 degree phase lag. The total phase lag now is 180 degrees, which is a setup for a sustained and building motor oscillation. This oscillation is commonly called mid-band instability or mid-band resonance.
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