Threshold Logic Unit (TLU)

Initializing live version
Download to Desktop

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

This Demonstration illustrates the concept of the simplest artificial neuron: the threshold logic unit (TLU). This pattern space represents the different possibilities that can occur whenever different inputs for the TLU are applied.


The controls and represent the system's inputs, while and are the synaptic weights. The output is evaluated with the following rule: is true if and only if . The decision line is represented in blue and the weights vector is shown as a dashed line. Everything that falls below the threshold (represented by the blue area) is evaluated to a false output. The bias is represented by . The blue dots represent the ideal possibilities that the inputs can take without the presence of noise. The dot turns red whenever the output is weighted as false and green when it is true.

This Demonstration can be used to show the robustness of a basic neural system as a logic function (AND or OR) upon noisy input (different from logic 1's and 0's).


Contributed by: Hector Sanchez (October 2018)
Open content licensed under CC BY-NC-SA



[1] K. Gurney, An Introduction to Neural Networks, Boca Raton, FL: CRC Press, 1997.


Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.