| 摘要 |
PURPOSE:To obtain a load other than real resistance by detecting voltage applied to an input terminal to supply it to a control part, programming values calculted through a real time clocking part and a value calculating part in a digital power source part and connecting the power source part to the input terminal through a resistor. CONSTITUTION:A voltage detecting part 10 detects voltage VIN applied to an input terminal 1 and applies the voltage to a control part 11. Values successively calculated through a real time clocking part 12 and a value calculating part 13 are programmed in a digital program power source 14 from the control part 11. The output voltage of the power source 14 is applied to one side of a resistor 9 of which resistance is fixed and the input terminal 1 is connected to the other side of the resistor 9. The value calculating part 13 finds VP from a prescribed formula in every DELTAt in accordance with real time clocks by using external voltage VIN and the known internal resistance RO for loads RO, LO, CO to control the program power source 14, so that a load other than the real resistance RO is obtained. |
