Transition and Diffusion capacitance in P-N junction diode Transition and Diffusion capacitance Transition capacitances: 1. When P-N junction is reverse biased the depletion region act as an insulator or as a dielectric medium and the p-type an N-type region have low resistance and act as the plates. 2. Thus this P-N junction can be considered as a parallel plate capacitor. 3. This junction capacitance is called as space charge capacitance or transition capacitance and is denoted as CT . 4. Since reverse bias causes the majority charge carriers to move away from the junction , so the thickness of the depletion region denoted as W increases with the increase in reverse bias voltage. 5. This incremental capacitance CT may be defined as CT = dQ/dV, Where dQ is the increase in charge and dV is the change or increase in voltage. 6. The depletion region increases with the increase in reverse bias potential the resulting transition capacitance decreases. 7. The formula for transition capa...
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Diode Resistance Resistance is the opposition offered to the flow of current through the device. Hence, diode resistance can be defined as the effective opposition offered by the diode to the flow of current through it. Ideally speaking, a diode is expected to offer zero resistance when forward biased and infinite resistance when reverse biased. However, no device can ever be ideal. Thus, practically speaking, every diode is seen to offer a small resistance when forward biased, and a considerable resistance when reverse biased. One can characterise the given diode regarding its forward and reverse resistances. Forward Resistance Even after forward biasing, the diode will not conduct until it reaches a minimum threshold voltage level. After the applied voltage exceeds this threshold level, the diode starts to conduct. We refer the resistance , offered by the diode under this condition as the forward resistance of the diode. That is, the forward resistance is nothing but ...
IR based Wireless Audio Transmitter and Receiver Circuit AUDIO By Aswinth Raj Sep 26, 2018 0 IR based Audio Transmitter and Receiver Circuit Infrared is the most commonly used wireless data transfer medium for limited range, and we already covered about simple IR Transmitter and Receiver circuit . Today in this Article, we will learn how to build a Crude Wireless Audio Transfer Circuit Using IR LEDs . Using this circuit you should be able to play songs from your IPod, mobile or computer to an external speaker without having to connect them directly though an AUX cable. The circuit comes with many limitations and there are better ways like Bluetooth to play songs wirelessly, hence this article only aims to help you understand simple audio circuits and at the same time have fun building it. Also the circuit of this project is simplified as much as possible to keep things simple and reliable to make the build easier, so this sh...
Bluetooth or WiFi – Which is Best for Your New Wireless Product? ELECTRONICS 0 Bluetooth or WiFi – Which is Best for Your New Wireless Product? There are numerous wireless standards at your disposal when creating a new product. Each choice has its own set of advantages and disadvantages. It really depends on your goal. In this article we’re going to look at the three most popular short-range wireless standards including: Bluetooth Classic , Bluetooth Low-Energy ( BLE ), and WiFi Direct . The Need for Speed If high-speed data transmission is the most critical requirement for your product then most likely WiFi Direct will be the best choice. Everyone has heard of WiFi, but few know of WiFi Direct. Although that is changing. Standard WiFi requires an access point. So if you want to transfer data from one device to another it must pass through the access point. WiFi Direct has the speed advantages of WiFi without ...
10 Most Common Mistakes while using Arduino By Odunlade Emmanuel Oct 26, 2018 0 10 Most Common Mistakes while using Arduino Starting out as a beginner with the Arduino, can be quite challenging for people without electronics background, you’d come across errors, some of which may have simple solutions but might take you days to solve. So to make things a little bit easier, I have created a list of 10 most popular Arduino errors along with possible solutions to them. 1. Arduino Board not Recognized This refers to a situation where an Arduino board, connected to a computer is not recognized by the computer. When this happens, the board is usually not listed under the port lists of the Arduino IDE and is sometimes labeled USB2.0 under the device manager. This happens when you use certain cheap Arduino clones which use the CH340g USB to Serial converter chip instead of the FTDI (FT232RL) and others used by the standard Arduino boar...