What are Typical Devices Based on Analog Circuits?
Analog circuits are rarely fully analog these days, but they are used for a range of different devices. Amplifiers are oftentimes analog circuits, provided they utilize transistors or vacuum tubes. Oscillators are typically analog circuits.
There are some instances when it is relatively difficult to differentiate between an analog circuit and a digital circuit. This is quite simply because so many analog circuits have digital components worked into them and, because of that, it is sometimes rather unclear whether a circuit is truly digital or analog.
Digital circuitry uses discrete voltages and that makes a great deal of difference in how they operate. Digital circuits are oftentimes made up of a variety of simple components and, in some cases, a variety of simple electronic devices that, when working together, allow for a vast array of functions to be performed. Digital circuits are capable of performing digital logic, which is one of the most important capabilities they have and the one that has likely contributed the most to the nature of modern life.
Below are listed some of the most basic components of any digital circuit. These components are oftentimes combined into very complex arrangements that allow a device based on digital circuits to perform enormously complex tasks, many of which have become so commonplace that they are likely taken for granted. The computer on which you are likely reading this article is really nothing more than a collection of digital building blocks working together to perform the task of making the document available.
Logic gates are devices that are utilized to perform digital logic. They come in several different varieties, including AND, NOT, XNOR, NOR. Logic gates can be created in several different ways, even utilizing vacuum tubes.
The primary function of a logic gate is to act as a type of switch. Many of these combined together are capable of performing Boolean logic, which is the foundation of how modern computers work. Logic gates are oftentimes combined in huge numbers. For example, a microprocessor may have in excess of 100 million gates that make it up and enable it to perform its functions.
An adder is exactly what the name implies. It is a type of circuit that performs the mathematical function of addition. Most of these devices in digital circuits utilize binary numbers to perform addition. They can be made more sophisticated and turned into devices known as adder-subtractors.
Flip-flops are devices that can store information in a circuit. They stored data that is described as state data. A flip-flop will have one or more inputs that can take input and use that to convert its state information. In sequential logic, a flip-flop is the most basic storage device.
A counter can count the number of times that a process has occurred or that a given event has occurred. These devices oftentimes utilize clock signal to keep count.
A registrar stores information. The information is stored in a form that can be written or read all at once. Registers are sometimes used in conjunction with one another, along with devices that transform data.
A multiplexer can take multiple inputs and send them along on a single line. These are oftentimes referred to as data selectors. These devices allow more than one signal to share a device or to share a resource, and are fundamental building blocks of digital devices.
A Schmitt trigger is a device that is capable of converting analog signals into digital signals. A Schmitt trigger also removes noise from circuits, and can actually function as a flip-flop or a latch.
Highly Integrated Devices:
Some of the basic components of digital circuits are highly integrated devices, meaning that they are much more complex and powerful than a simple component, such as a flip-flop.