Restoring system of digital signal

Abstract

Abstract PURPOSE:To restore a transmitted original signal with no effect of a level shift or level variation of a transmitted signal by extracting selectively the data signal obtained through detection for plus or minus of a secondary differentiation signal with a gate signal. CONSTITUTION:An original signal is weakened by a transmission line and turned into a signal S1, and this signal S1 is differentiated by a differentiating circuit 2 to obtain a signal S2. The signal S2 is differentiated by a differentiating circuit 3 and turned into a signal S3. The plus and minus of the signal S3 are detected by a plus/minus detecting circuit 4, and a signal S4 is extracted. The signal S4 is supplied to a latch circuit 6 as a data signal. While signal S3 is differentiated by a differentiating circuit 8 to obtain a signal S5. A signal S6 is compared with a prescribed level TH at a level detecting circuit 5 to obtain a signal S7. The circuit 6 latches the signal S4 with a gate signal S7. Then the circuit 6 transmits the signal S4 directly when the S7 is set at H and holds the S4 when the S7 is set at L respectively. As a result, a signal S8 equivalent to the original signal is extracted at an output terminal 7.

Inventors

• 👤 Akira Toyama
• 👤 明 遠山

Bibliographic Details