| 摘要 |
PURPOSE:To obtain correlation function with a simple circuit constitution, by interrupting the input analog signal with a delayed binary signal, in the correlation device used for the signal detection for radar and sonar and characteristic pickup for audio recognition. CONSTITUTION:When an analog signal is input to an input terminal 1 and it is fed to a binary signal conversion circuit 2, the binary signal including the same spectrum as the analog signal is output from the circuit 2. Further, the output is delayed at a delay circuit 3 to obtain delayed binary signals with different delay time from delay output lines 3a, 3b, 3c...3n, and they are fed to the switch circuit 5 after being added to the input signal amplified 4. The circuit 5 outputs the product signal between the analog signal and delayed binary signals on output lines 6a, 6b...6n, and each signal is output in average at a plurality of RC circuts at an average circuit 7. Thus, the correlation function can be obtained with a simple circuit constitution. |
