H - Electricity – 04 – J
Patent
H - Electricity
04
J
340/71
H04J 3/12 (2006.01) H04J 3/14 (2006.01)
Patent
CA 1312362
ABSTRACT OF THE DISCLOSURE There is described a fault detection signal transmission system having a transmit terminal and a receive terminal. The transmit terminal includes a fault detector circuit for generating a fault detecting signal by detecting an apparatus fault based on at least an input state of a transmit interface circuit, a multiplex conversion circuit for producing a multiplex signal by multiplexing at least a parity check signal with an output signal of the transmit interface circuit to produce a multiplexed signal, a transmit parity check circuit for checking parity with the multiplexed signal and a parity check signal output circuit responsive to the fault detection signal and an output signal of the transmit parity check circuit for producing, when the fault detection signal is representative of a fault, the parity check signal by inverting a logical state of the output signal of the transmit parity check circuit. The receive terminal includes a demultiplex conversion circuit for extracting from a received signal the parity check signal which is inserted at the transmit terminal, a receive parity check circuit for checking parity with the received signal and a parity check signal comparison decision circuit for deciding whether or not an apparatus fault exists by comparing the parity check signal extracted by the demultiplex conversion circuit and an output signal of the receive parity check circuit.
549635
Fukuda Seiji
Sasaki Katsuhiro
Corporation Nec
G. Ronald Bell & Associates
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