flip flop

Definition and Types of Flip Flop Circuits

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There is a circuit type called flip flop that uses two inputs and a bistable multivibrator logic gate. Examples are computers, namely chips and memory and several other electronic devices.

On the other hand, this system can actually be applied to simple lights as long as you understand how it works. Then what is meant by flip flop? Here are detailed understanding, types, working principles and also examples on everyday electronic circuits.

Flip Flop is?

flip flop

Definition Flip flop is a logic circuit consisting of two stable inputs and is able to store binary data where the output is based on the input value and the previous output logic state.

The flip flop circuit can also be called an interconnected electronic component and is like a data storage memory. The stored data can be changed based on varying input values

With the concept of a bistable multivibrator that exists on Flip-flop, making this circuit has mains voltage which is stable and changes immediately if it is indeed triggered by another element.

The Flip-Flop series was first discovered by British physicists F. W. Jordan and William Eccles precisely in 1918 in England.

You need to know, flip-flop is a type electronic circuit which is capable of storing memory. That is, the principle of the flip flop is indeed made in such a way that it is able to apply logic. Various types are available according to variations and needs.

Types of Flip Flop Types

There are several types of flip flop circuits, including S-R Flip-flop, D Flip-flop, T Flip-flop and JK Flip-flop. The main difference in this type of flip-flop is the number of inputs they have and how they change values.

For each type, there are different variations that improve their operation. To make it easier to understand, here we describe the details of the review:

  • SR flip flop

flip flop

SR Flip Flop Range

The first type of flip flop is SR atat set and reset. In this system, there are two inputs: set where to start the flow to execute the task and reset, which is to return to normal function.

The circuit will look like two inputs where each is connected to a different output. However, there is a connection in the middle with nor and nand logic so that one input e.g. set can affect the output of another.

This is the basic type and can be developed with several variations. For example, the set position is flipped to reset and then added a second conjunction before heading to the output. This section is in charge of connecting S and R directly with CP intermediaries. The following is a table of SR Flip-Flop input values:

S R Q Q’
0 0 0 1
0 1 0 1
1 0 1 0
1 1
  • JK flip flop

flip flop

JK Flip Flop Range

Jk flip flop uses three inputs namely J, K, and CLK with the CLK position in the middle. This also includes the development results of the SR system. Interestingly, there is a connection from the J and K inputs to separate outputs directly.

The job of CLK input is to make sure there is a connection from J to K and vice versa and set it to match. In this way, K can send to J’s output more briefly without having to go into the main circuit.

flip flop

This is a system made with several layers so that it still works even if one does not work. The following is a table of JK Flip-Flop input values:

J K Q Q’
0 0 0 0
0 1 0 0
1 0 0 1
1 1 0 1
0 0 1 1
0 1 1 0
1 0 1 1
1 1 1 0
  • D flip flop

flip flop

D Flip Flop circuit

D flip flop is the result of SR modification with the addition of a note inverter. This position is in the input part of the CLK which replaces R. There the main input is D.

Furthermore, the circuit still uses two outputs and the same configuration as the SR system. In this case, the output can only be changed at the edge of the clock, and if the input changes at a later time, the output will not be affected. Here’s for the table:

Clock D Q Q’
↓ » 0 0 0 1
↑ » 1 0 0 1
↓ » 0 1 0 1
↑ » 1 1 1 0
  • T flip flop

flip flop

T Flip Flop circuit

The next kind of flip flop is the T type which only uses one input. From the basic SR circuit, the set and reset inputs are put together and given direct access to the two outputs separately.

It is an effective system for static and rarely changed information. This type of T has the ability to complement Toggle, that’s why its other name is Toggle Flip Flop.

T Q Q (t+1)
0 0 0
1 0 1
0 1 1
1 1 0


How Flip-Flop Works

flip flop

Basically, the way a flip flop works is the same as how  a transistor works  as a switch. Consider the flip-flop circuit image above, if the circuit is given a voltage, then one of the transistors will be in the ‘ON’ condition.

The ON condition on the transistor follows the capacitor whose charge value is higher than other capacitors. This capacitor will discharge electrical charge so that the transistor connected will be in the ON (temporary) condoso.

The transistor in ON mode will make the capacitor connected to the collector leg charged electrically. If one transistor is on then the other transistor will be in the off condition.

This will apply continuously alternately so that there is a rotation of lights called flip-flop lights. Such is the working principle of flip-flop in electronic circuits.

Read also Definition of Light Sensor and Circuit Examples

Examples of Simple Flip Flop Circuits

You can learn from simple to complex types of simple flops. You need guidance to understand how the circuit works. Next, prepare the basic electronic components and then connect them.

How the flip flop works can be shown by the flip flop light scheme. Here are some examples of tools that use a simple flip flop circuit:

  • 12 volt LED Light Flip-Flop Circuit

flip flop

LED Light Flip Flop Series

The flip flop lamp circuit is actually rarely applied at home. However, this system is useful for learning how it works and the patterns used.

You can make such a series with materials and Electronic components which is easy to obtain as in the 12 volt flip flop lamp circuit in the example picture above.

  • Computer & smartphone Flip-Flop Series

flip flop

PC Flip Flop Memory Family

Flip flop is very often applied to chip systems in computers or smartphones. With this circuit, you know the existence of RAM that works based on logical functions. In addition, there is also a digital system for example a clock on a laptop that does not seem to stop when the tool is turned off.

In smartphones and tablets, this flip flop has experienced quite drastic development because it adjusts to the needs of the room. The system is also more complex but the basic principle remains the same according to the types and types described earlier.

  • Flip-Flop Series on Electronic Devices

flip flop

Flip Flop TV Range

Another application of flip flop is electronic devices. Like chips, manufacturers put complex systems in place with the goal of efficiency. You also find this technology in tools such as televisions, radios, and others.

  • Simple Flip-Flop Circuit On PCB Board

flip flop

Another example of a simple flip flop circuit is a board that already contains several components in one. This is a simulated version of the chips used by computers and electronic devices. You can buy it at the nearest electrical store. Another function as a component when creating this technology-based tool.

You have understood the application of this circuit and system. In general, the results are two and in digital form i.e. signals 0 and 1 or other symbols. The circuit can be connected to each other to create a complex shape like a chip.

Flip flop requires a strong concept of logic to understand it. On the other hand, drawings and schematics will help to understand how things work. Next, the scheme is processed so as to form a circuit based on various possibilities


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