| 摘要 |
PURPOSE: To obtain a failure detection circuit for DC power supplies connected in parallel, which can function not only when any one DC power supply does not operate at all but also when the output currents are unbalanced. CONSTITUTION: First and second DC power supplies A, B connected in parallel feed DC power to a load through current detection circuits C, D. Detection levels (c), (d) of the current detection circuits C, D are connected through a first differential amplifier circuit E with the second DC power supply B. Detection levels (c), (d) are connected, while inverting the phase, with second and third differential amplifier circuits G, H through an attenuator. Outputs from the second and third differential amplifier circuits G, H are connected with a NAND circuit I. |
