| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital communication differential operational circuit, which avoids the situation of a signal processing means being unable to display its original performance due to duplexing of the code errors. SOLUTION: A differential coding circuit at the transmit side delays an output signal by n delay elements and adds the delayed signal to an input signal, to provide an output. A differential coding circuit on the receive side delays an input signal by n delay elements and subtracts the delayed signal from the input signal to provide an output. For the value of n, a number which is equal to or greater than the length m of the operational circuit is selected to avoid the situation of a signal processing means which includes an error correction circuit or parity check circuit, located outside the digital communication differential operational circuit, being unable to display its original performance due to duplexing of the code errors. |
