Diodes are often used for rectifying an AC voltage to a DC voltage. There are various types of diodes. For example, a photo diode is the one which allows the current to flow when light strikes it. These types of diodes are greatly used as light detectors. A diode is also known as a Rectifier. Resistors are electronic components that are used to create a precise quantity of resistance in a circuit.
Therefore, a resistor can also be termed as a two terminal passive device. They are generally made out of metal wire or carbon. These components are engineered to be able to maintain a stable resistance value.
They are available in various shapes and sizes. If the resistors are connected in a series, the current through each resistor remains the same. However, when the resistors are connected parallelly, then the supplied current is equivalent to the sum of the currents through each resistor.
Each of these resistors has a useful purpose. A resistor is generally formed from a type of resistive material and is put into a cylindrical form. A significant advantage of carbon composition resistors is their ability to withstand high energy pulses. However, they are not recommended if electrical noise is going to be a problem as they warm up. Thermal noise comes from electron holes moving around in the conductor. Larger value resistors create more noise than lower value resistors, all other things being equal.
When current flows through a carbon resistor, the entire carbon composition body conducts the energy which results in a higher energy capacity. Modern applications include circuit protection surge or discharge protection , high voltage power supplies, high power lighting, and welding. Film or Cermet resistors Film resistors are made of either metal film, carbon film, or metal oxide film deposited on an insulating ceramic rod or another substrate. Film resistors are also less noisy and more stable at higher temperatures than carbon composite resistors.
The resistive value is controlled by varying the thickness of the film. Thin-film resistors have a low TCR, long-term stability, and are good for applications that require high precision. The laser cut patterns are part of what makes film resistors capable of closer tolerances than the simpler carbon composition resistors.
Film resistors provide a very high resistor value ohms versus other types of resistors. Film resistors are typically used for very low wattage applications and have good characteristics for tolerance, stability, and TCR. They have little noise and high linearity because of a small voltage coefficient.
There are many applications, depending on the film type. For example, metal film resistors are used for active filters or bridge circuits. These are the miniature brain cells of the computer made of silicon, a chemical element usually found in sand. Generally, transistors are found in a huge variety of electrical devices such as portable stereo systems, pocket calculators personal computer games etc. It consists of three layers of a semiconductor material, each capable of supporting a current.
Resistance: The resistor is an electronic component that limits or limits the current flow and divides the voltage in an electronic circuit. Its main purpose is to provide a precise amount of electrical resistance.
It is one of the most important passive components of an electronics industry, because without these components, active devices can not process electrical signals.
Resistors mainly added to circuits where they complement active components such as operational amplifiers, micro-controllers, integrated circuits etc.
These are the two components used in electronics. A resistance to a fixed amount of resistance that does not change, it also has only two terminals, an input and an output, the output depending on the input and resistance.
0コメント