One out of n checking apparatus and method

Details One out of n checking apparatus and method One out of n checking apparatus and method

G - Physics

06

F

354/126, 354/222

G06F 11/08 (2006.01)

Patent

CA 2016179

ONE OUT OF N CHECKING APPARATUS AND METHOD ABSTRACT OF THE DISCLOSURE A one out of N checking circuit for determining whether exactly one of N signal lines is active at any given time. The circuit includes a hierarchal structure of nodes which pairs the N signal lines together in a series of steps. Each node includes a pair of output signal lines. The first signal line carries a signal representing whether an active signal line was "seen." The second signal line carries a signal representing whether an error has occurred, i.e. multiple active lines were seen. After each step, the number of signal lines is reduced by one-half until only two signal lines remain. At that point the two signal lines are compared and a final error signal is transmitted.

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