Block Diagram of Digital Voltmeter
Let us see the block diagram of digital voltmeter and see how it works.
The voltmeter begins working when it receives an input i.e the input signal whose voltage is to be measured. The input signal can not be read as such and thereby is converted in rectangular pulse by the pulse generator. The frequency and width of the generated rectangular pulse is selected using digital circuitry present inside the generator. The AND gate is added mainly to ensure that train pulses have the same duration as the rectangular pulse. The train pulse and rectangular pulse are fed as the input and the output is high only when both are high.
The decimal display section performs the task of counting total number of impulses and the time difference between them. This count is generally displayed on an LED screen after calibration in the required scale.
Working Principle of Digital Voltmeter
A voltmeter is a significant device used in electronics engineering for measuring potential developed across various devices. Depending on the requirements these voltmeters can be designed into two types that being digital and analog. In this article, we will briefly discuss the two types of voltmeters. Later we will study about digital voltmeter and the working principle behind it. We will also see the block diagram of a digital voltmeter and how it works. The digital voltmeter can further be divided into certain types and we will discuss them too. This description will include talking about their specifications as well. After the discussion, we will talk about the advantages and disadvantages of digital voltmeters which are considered while using digital voltmeters in some real-life appliances. This will conclude the article with some Frequently Asked Questions for user reference.
Table of Content
- Digital Voltmeter
- Working Principle
- Block Diagram
- Types
- Advantages
- Disadvantages
- Applications