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AND gate from diodes

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rajaram04

rajaram04

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Hello sir
i made so many transistorized gate circuits but this time failed to design some gates with diodes specially AND gate , please help
 

This is a diode AND gate. If one of the inputs A or B is grounded, current flows through the diode and the output node is at a low voltage. The only way to get a high output is by having both inputs high. Output will be = AB

 

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