Basic Computing

Hertz in computer science What does this unit mean?

In this article you will learn about the meaning of Hertz computing, an important unit of measurement of frequency used in computing. what is Hertz in computer

Hertz computing what is Hertz in computer

what is Hertz in computer
what is Hertz in computer

The Hertz (Hz) unit, named after the German physicist and academic Heinrich Hertz, has applications in various areas, such as: physics, radio, television, telecommunications and computing. Therefore, to differentiate the one that interests us, from now on, we will call it Hertz computing.

In this way, we can say that the computer Hertz is a unit of measurement belonging to the international system of units (SI), which is equivalent to one cycle per second. It is expressed in multiples, such as: kilohertz, megahertz, gigahertz, terahertz, petahertz, and hexahertz.

In computing, this unit measures the clock speed of microprocessors. In other words, the computer Hertz indicates the electrical switches that occur within a transistor, that is, it quantifies the frequency with which the flow of an electric current opens and closes during one second.

In addition, it provides the necessary power to transmit the bits from one place to another, either from the memory to the processor, or from the processor to the computer screen.

In this regard, it is important to note that although many people tend to set the data processing performance of the central processing unit (CPU), as measured by the computing Hertz, this is not entirely adequate. The primary reason for this conception is due to the difference that exists in the operation of the processors, finding that some of them are capable of performing multiple operations in a single cycle, while others require several clock periods to execute a single operation.

It is worth noting that among the types of operations that a processor can execute are: addition, subtraction, multiplication, division, and floating point operations. In addition, processors contain instructions capable of executing specific code.

Based on all of the above, it is necessary to clarify the following concepts:

Processor what is Hertz in computer

It is the device responsible for carrying out certain operations from the main memory of the computer. These operations are possible thanks to the follow-up of the instructions generated by the programs. In other words, the processor is the one who executes each of the instructions that make up the subtasks of a program.

Because a processor is an electronic component, which only understands voltages and amps, and the presence or absence of a signal, all the instructions it receives must be transformed to zeros and ones, that is, to binary code.

Clock cycle

It constitutes a series of electrical pulses that are emitted by the microprocessor at constant intervals. Its main purpose is to indicate the rhythm with which each of the steps that make up the instructions of the programs should be carried out.

Clock frequency what is Hertz in computer

It refers to the speed in cycles per second at which the computer performs basic operations. It is a physical quantity measured in Hertz, which indicates the frequency with which the transistors of the microprocessor open and close the flow of electric current, that is, the frequency with which they switch electrically.

Hertz computing and refresh rate

A concept widely related to Hertz computing is the refresh rate, which refers to the times in which the screen of a computer, a telephone or a television, turns on and off per second.

In general, a screen is constantly on and off to configure the colors of an image, this does it repeatedly at a speed imperceptible to humans. In such a way that the more times the process is repeated in a second, the more hertz are involved, and the more hertz the screen will be sharper, also having a greater capacity to display images.

Other uses

As already mentioned, Hertz is used in several areas. Here are some of its other applications:

In fields related to audio it is used to describe sine waves and musical tones.
In telecommunications, it refers to the measurement of the range of frequencies opposite to the wavelength.
While in physics, it is used to measure the number of times a wave repeats per second, be it sound or electromagnetic.

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