| 摘要 |
PURPOSE:To obtain easily a test signal of a D/A converter, by digitizing and then storing an optional waveform of an analog signal. CONSTITUTION:An optional analog waveform is set at a setting circuit 20. An arithmetic circuit 22 samples an analog waveform which is set on the basis of the signal produced by a clock 23 and then converts the waveform into a digital code. The digital signal is stored in a random access memory 25. When a test is given to a D/A converter 14, the digital signal is read out of the memory 25 and applies it to the converter 14 via an I/O interface 26. Then an analog output signal of the converter 14 is evaluated by a measuring device 16. |
