| 摘要 |
PURPOSE:To enable the recording and the reproduction of a random waveform, by providing a random wave oscillation control system with a digital signal recorder/reproducer to record the oscillation characteristic of a sample into a semiconductor memory by a digital signal. CONSTITUTION:An analog input signal S1 from an input terminal 15 is converted into digital with an A/D converter 16 and memorized into a specified chain within a memory system 17 as N time-series signals. Consequently, an address counter 25 memorizes the digital signal into a memory increasing the address value by 1 up to the maximum N. The clock is selected so as to more than double the upper limit frequency of the band of a random signal. A decoder 28 makes the selection of a memory chain during the recording and reproduction. Then, at the reproduction, the signal during the recording is chosen through the selection of the output channel and converted into an analog signal with a D/A converter 21. Furthermore, the quantization noise is removed from the analog signal with a lowpass filter 33 from the analog, which is finally outputted as analog output signal S2 from an output terminal 22.
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