| 摘要 |
<p>PROBLEM TO BE SOLVED: To shorten the time when controlling switch elements forming a signal switcher multiple times.SOLUTION: A switching control circuit comprises: a processing part 33 for executing ON/OFF control for switch elements 21-23 in a signal switcher 4 disposed between a power supply part 5 and a plurality of resistors 11 (11a-11c) and configured to supply a current I for measurement by connecting one resistor 11 selected from among the plurality of resistors 11 to the power supply part 5 in response to ON/OFF control of the switch elements 21-23; and a detection part 32 for detecting the current I for measurement being outputted from the power supply part 5 to the signal switcher 4. The processing part 33 compares a current value I1 of the current I for measurement which is detected by the detection part 32 after control for stopping the output of the current I for measurement is executed on the power supply part 5, with a current threshold Ith and, when it is detected that the current value I1 of the current I for measurement becomes equal to or less than the current threshold, executes ON/OFF control on the switch elements 21-23.</p> |
