EXTREME VALUE MEASUREMENT OF ELECTRICAL QUANTITY FOR ULTRASONIC NONNDISTRUCTIVE MATERIAL TEST

摘要

To detect the maximum and minimum turning point of a signal (1) the signal is amplified in a buffer amplifier (5) and applied directly to one input of a comparator (6) and to the other input by way of a delay line (7). The resulting output signal of the comparator is a two level signal which switches levels at the maximum and minimum turning points of the signal (1) to be analyzed. IMAGE