| 摘要 |
PURPOSE:To always stably detect a pseudo code error with no adjustment and to attain proper switching control with simple constitution and handling by detecting the pseudo code error through the logical processing of an identification signal composed of a binary digital signal outputted from an identifying device. CONSTITUTION:A 2<2n> value orthogonal amplitude modulation wave is bisected by a divider 13, a 2<n> value demodulation signal obtained through synchronization detectors 11a, 11b, low pass filters 13a, 13b and operational amplifiers 14a, 14b is introduced respectively to identifying devices 15a, 15b at in-phase and orthogonal phase each and the identification output is subjected to logical processing to obtain a demodulation data. A pseudo code error detection circuit 30 applies exclusive OR processing to adjacent bits from high-order (n+1)th bit to at least high-order (n+3)th bit in the identification output of at least one identification device among the identifying devices, and applies prescribed AND or OR processing to each output of the exclusive OR processing and outputs its output as a detection signal of the pseudo code error. |
