Study on a New Peak and Hold Circuit for Electromagnetic Pulse

• Main Authors: Han-Chang Teng, 鄧漢章
• Other Authors: Chih-Hsiung Shen
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/69918219345279551654

碩士 === 國立彰化師範大學 === 機電工程學系 === 99 === This dissertation proposed a new circuit design for the peak and hold circuit with feedback of sensing the electromagnetic pulse (EMP), accepting transfer signal to produce a holding voltage levels corresponding to the peak amplitude and to raise the holding effect. In order to compensate the diode turn-on voltage error of a simple diode peak detector, and improve the reaction time to pull up the totally holding effect, we use the new peak and hold circuit with and without feedback to compare by the detective transfer signal of EMP reaction of the raising time. The new peak and hold circuit has two stages combined by simple diode peak detectors. The feedback circuit based on positive feedback configuration that avoid input signal weaken can improve output signal. Also the clamping network could add charging-discharging current ratio to compensate the diode turn-on voltage error of a simple diode peak detector, and raise up the reaction time of the totally detection. The first stage in feedback system can improve 21.2% to peak the amplitude, and second stage rise up 40 % to hold. The amplitude intensity of the EMP radiation signal utilizes portable coils receive from difference magnetic field directions, and uses the new peak and hold circuit with feedback to detect the peak holing voltage. We finally realize EM pulse distance measurement with the peak voltage that can be derived from the amplitude intensity of the EMP, which is corresponding to the detective distance. Our research shows a practical EMP distance measuring technique with careful analysis and measurement by our built EM pulse generator.