Current Source in Electronic Devices
Current Source is a two-terminal element that allows the flow of current and also indicates the direction in which current flows. The current flowing is denoted in Ampere(A).
We can define a relationship between current sources and voltage variables around a network is given by Ohm’s law. This is denoted by :
Now , since current is constant then we can define the voltage developed for a resistance R across the terminals as
V=IR
This voltage will become larger for larger values of R because the current remains independent of R.
Current Source in Power Supplies
In a Power Supply circuit, current source determines the output current to a certain level. These are used especially in LED lightning. Since the current in such circuits is constant ,the voltage developed is directly proportional to resistance across it.
The power generated can be denoted by
P=I2R
Due to constant current, we can say that with increasing R the power delivered by the current source increases. This can also become infinite if resistance becomes infinite. To avoid this , we need to ensure that our circuit is not an open circuit.
Current Source
A current source is an integral part of electronic circuits which is used for supplying current in the circuit. In this article, we will discuss these current sources along with their types. We will also learn about their nature through some characteristics. These characteristics when put to use can be applied at various places which have been discussed through the applications. We will conclude the article with some points and list some frequently asked questions for reference.
Table of Content
- What is Current Source?
- Types
- Characteristics
- Current Source Vs Voltage Source
- Applications
- Current Source in Electronic Devices