CONNECTION AND FREQUENCY CHARACTERISTIC TEST CIRCUIT AND TEST METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a device and method for measuring the frequency characteristics of a transmission path.;SOLUTION: A connection and frequency characteristic test circuit includes: an oscillation circuit 1 for generating a sine wave having an arbitrary frequency; a frequency-division circuit 2 for frequency-dividing the output of the oscillation circuit 1; a multiplication circuit 3 for multiplying the output of the oscillation circuit 1; a selector for receiving a test mode signal 5 for designating a test mode, and for selecting the output of one of the oscillation circuit 1, the frequency-division circuit 2, and the multiplication circuit 3 in accordance with the test mode signal 5, and for outputting the selected signal; a reference voltage generation circuit 6 for generating a desired reference voltage; a comparator 7 for comparing the signal output from the selector with the reference voltage; and a comparison result holding circuit 8 for receiving the test mode signal 5, and for, when the test mode is designated by the test mode signal 5, holding a comparison result to be output by the comparator 7.;COPYRIGHT: (C)2015,JPO&INPIT