| 摘要 |
PURPOSE:To enable the prolonged holding of a peak value at a high accuracy by detecting and holding the peak value by a digital signal obtained through an A/D conversion. CONSTITUTION:An A/D converter AD1 starts an A/D conversion by a control signal of a data processing control section DP1 as transmitted through a control signal line CL1 and a digital signal obtained is transmitted to the control section DP1 through a bus DB1. The control section DP1 compares the digital signal with a peak value already held. The peak value is held as it is when it is larger than the signal while updated with the digital signal when the peak value is smaller. Then, the updated peak value is outputted to a bus DB2 and the output signal Vo of a converter DA1 is updated. |
