a little help about multiplexer

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dimebag

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hi
sorry if the topic is in wrong section
im asking question in regard of my friend
their university master asked them to build multiplexer circuit with diode and transistor sounds they call it DTL logic but my friend do not know how the gates ( and , or , not ) are supposed to be designed with this logic
it should be 2 to 1 multiplexer
can any one give me digram for this multiplexer or at least guide me bout how the gates ( and , or , not ) should be designed with this logic?
he is in urgent need
thanks so much in advance
 

DTL: diode-transistor logic
and: parallel diodes with their anodes wired together followed by a pull-up circuit. Add signals from their cathnodes, you'll get their "and" result at the anode.
not: a simple common-emitter invertor
or: can be derived from the above two
Hope that helps!

Jianjing526
 

hi
man thanks really
im not that good in electronic
ill give these exlanation to him right now
and something else
can you give me any schematic of this kind circuit
thanks so much
 

Tools are not available now. I googled a schematic and posted
it out, hope that helps!

 

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