Switching between positive and negative logic is commonly used to achieve a more efficient logic design.
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In digital electronics, a high voltage usually refers to that representing a logic 1 in positive logic and a logic 0 in negative logic.
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The latches pulled away in this manner are disengaged for the rest of the cycle, while the remaining latches take part in character selection, hence the term " negative logic ".
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Each negative logic selector bail that is displaced by the interposer in turn pulls a latch interposer and link which causes a selector latch near the cycle shaft to be pulled away from the latch bail.
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For negative logic, where logical 0 is defined to be a higher voltage than logical 1, Transistor-transistor logic provides a NOR function . talk ) 13 : 33, 6 September 2014 ( UTC)
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The cost overruns caused by not getting the LSI chips and other design screw ups by Burroughs ( the control unit was built with positive logic and the PEs with negative logic, etc . ) made the project untenable.
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The minus five selector bail pulls an interposer and link which causes a latch to disengage from a cam, allowing it to move an additional input into the whiffletree that subtracts five units of rotation from any negative logic inputs.
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In a machine with a North American keyboard, there are five " negative logic " selector bails ( two for tilt and three for rotation ), and one " positive logic " bail ( called " minus five " ) for accessing characters in the opposite direction of rotation.
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Similarly for the AND it was stated, If input A or B or C is 0 the output will be 0 . In negative logic each node at the lower voltage would become a logic 1, making the statement, If input A OR B OR C is 1 the output will be 1 . That is the definition of an OR function.
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In the OR it stated, Only if all inputs, A and B and C are 0 will the output be 0 . In negative logic each node at the lower voltage would become a logic 1, making the statement, Only if all inputs, A AND B AND C are 1 will the output be 1 . That is the definition of an AND function.
