By Charlotte Myriam. Diode. Publised at Tuesday, December 26th 2017, 14:27:42 PM. A diode is a one-way conductor. It has two terminals, the anode or positive terminal and the cathode or negative terminal. Ideally a diode will pass current when its anode is made more positive than its cathode, but prevent current flow when its anode is more negative than its cathode. In the circuit symbols shown in Fig. 2.0.2, the cathode is shown as a bar and the anode as a triangle. On some circuit diagrams the anode of a diode may also be indicated by the letter ‘a’ and the cathode by the letter ‘k’.
By Valentine Sybille. Diode. Publised at Wednesday, December 27th 2017, 03:25:22 AM. For silicon diodes, the typical forward voltage is 0.7 volts, nominal. For germanium diodes, the forward voltage is only 0.3 volts. The chemical constituency of the P-N junction comprising the diode accounts for its nominal forward voltage figure, which is why silicon and germanium diodes have such different forward voltages. Forward voltage drop remains approximately constant for a wide range of diode currents, meaning that diode voltage drop is not like that of a resistor or even a normal (closed) switch. For most simplified circuit analysis, the voltage drop across a conducting diode may be considered constant at the nominal figure and not related to the amount of current.
By Charlotte Myriam. Diode. Publised at Wednesday, December 27th 2017, 04:31:39 AM. Diodes are one of the simplest, but most useful of all semiconductor devices. Many types of diode are used for a wide range of applications. Rectifier diodes are a vital component in power supplies where they are used to convert AC mains (line) voltage to DC. Zener diodes are used for voltage stabilisation, preventing unwanted variations in DC supplies within a circuit, and to supply accurate reference voltages for many circuits. Diodes can also be used to prevent disastrous damage to battery powered equipment when batteries are connected in the wrong polarity.
By Valentine Sybille. Diagram. Published at Saturday, August 19th 2017, 00:16:17 AM. A PCB Layout is the resulting design from taking a schematic with specific components and determining how they will physically be laid out on a printed circuit board. To produce a PCB Layout, you must know the connections of components, component sizes (footprints), and a myriad of other properties (such as current, frequencies, emissions, reflections, high voltage gaps, safety considerations, manufacturing tolerances, etc.).
By Charlotte Myriam. Circuit. Published at Thursday, August 17th 2017, 22:51:19 PM. The real part and imaginary part of impedance are interpreted as a resistive part that dissipates energy and a reactive part that stores energy. Resistors can only dissipate energy and therefore their impedances have only a real part. Capacitors and inductors can only store energy and therefore their impedances have only an imaginary part. When resistors, capacitors, and inductors are combined, the overall impedance may have both real and imaginary parts. It is important to note that the definition of impedance preserves the definition of resistance.
By Bertille Solange. Circuit. Published at Tuesday, August 15th 2017, 22:28:56 PM. Electronic signals are represented either by voltage or current. The timedependent characteristics of voltage or current signals can take a number of forms including DC, sinusoidal (also known as AC), square wave, linear ramps, and pulsewidth modulated signals. Sinusoidal signals are perhaps the most important signal forms since once the circuit response to sinusoidal signals are known, the result can be generalized to predict how the circuit will respond to a much greater variety of signals using the mathematical tools of Fourier and Laplace transforms.
By Cyrielle Marjolaine. Circuit. Published at Monday, August 14th 2017, 20:40:30 PM. Many different types of components and devices can be found in modern circuits, including resistors, capacitors, and inductors, semiconductor devices like diodes, transistors, and integrated circuits, transducers like microphones, light sensors and motions sensors, actuators like motors and solenoids, and various other devices like heating and lighting elements. Devices in a circuit are connected to one another by means of electrical conductors, or wires. These wires can move electric currents between various points in a circuit. Once a wire connects two or more devices, the wire and all attached device connectors are said to form a single circuit node or net. Any electrical activity on a given net is communicated to all devices attached to the net. Certain nets provide electric power to devices, and other nets carry information between devices. Nets that carry information are called signals, and signals transport information encoded as voltage levels around a circuit. Signal nets typically use smaller conductors, and transport very small currents. Nets that carry power are called supply rails (or just supplies) and supply rails transport electric power around a circuit. Power nets typically use much larger conductors that signal nets, because they must transport larger currents.
By Valentine Sybille. Diagram. Published at Friday, August 11th 2017, 20:20:28 PM. There are two commonly used capacitor symbols. One symbol represents a polarized (usually electrolytic or tantalum) capacitor, and the other is for non-polarized caps. In each case there are two terminals, running perpendicularly into plates. The symbol with one curved plate indicates that the capacitor is polarized. The curved plate represents the cathode of the capacitor, which should be at a lower voltage than the positive, anode pin. A plus sign might also be added to the positive pin of the polarized capacitor symbol.
By Cyrielle Marjolaine. Circuit. Published at Wednesday, August 09th 2017, 17:27:34 PM. If the components are connected in a parallel format they would be termed to be a parallel series. In this sort of a connection all the components would receive the same voltage, while the current would be divided amongst the components.
By Madeleine Catherine. Circuit. Published at Saturday, August 05th 2017, 15:56:27 PM. The concept of complex impedance introduces a unified representation for resistors, capacitors, and inductors, whereby a circuit’s frequency response from input to output can be determined using KVL and KCL, where each element is assigned the appropriate impedance. The key assumption to this point is that the input to the circuit must consist solely of DC and/or sinusoidal signals. Now, this analysis is be extended to include arbitrary input signals by using the mathematical techniques of Laplace transforms.
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