Drawing 4-2 Priority Encoder Circuits

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There are various methods to draw a 4-to-2 priority encoder, leading to confusion among learners. Different resources, including YouTube videos and online articles, showcase distinct designs based on the polarity of inputs and outputs. The choice of logic gates and design techniques can vary significantly depending on the technology used. Additionally, examples of 8-input priority encoders illustrate the versatility in design approaches. Understanding these variations is crucial for effectively designing priority encoders.
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Hello guys! I am getting confused in drawing the circuit for a priority encoder. Because I saw some youtube videos and also on google , they all are drawing 4 to 2 priority encoder differently.These both are 4 to 2 priority encoders.
 

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There are many ways of building a priority encoder using different logic gates. The particular technique will depend on polarity of the inputs, outputs and the technology employed. You should be able to design several other implications.
 
Here are three different examples of 8 input priority encoders.
8_input_Priority_Encoders.png
 
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