| 摘要 |
PURPOSE:To inspect circuit elements such as diodes and the like without cutting off a circuit, by inspecting a circuit in parallel connection of inductance elements and diodes via an operational amplifier and maximum and minimum value detecting circuit. CONSTITUTION:A circuit to be inspected in parallel connection with an inductance element of an inductance L and a diode 5 is connected with an output of an operational amplifier 3 and an its inverting input terminal, and a trapezoidal pulse from a pulse generating circuit 1 via a resistor R1 is applied to the inverting input terminal. Thus, as a current (i) flowing to the resistor R1 is increased/ decreased with time, a voltage V2 based on EquationIis outputted from the amplifier 3 (in Equation, VF is a forward voltage of the diode 5). When the output voltage is detected at a positive/negative peak voltage detection circuits 8, 9 which are controlled switchingly, a specified detected output is produced from a voltage measuring device 11 only at normal state, allowing to inspect circuit elements such as diodes without cutting off the circuit. |
