| 摘要 |
PROBLEM TO BE SOLVED: To obtain a load voltage having accuracy, with a simple constitution and at a reduced cost. SOLUTION: A voltage detection circuit 4 is connected with a current detection circuit 5 but is not connected directly with positions, which are at ground potential. The voltage at a point P1, or the junction point between the detection circuit 4 and the current detection circuit 5 is kept at Vref1, by means of an operational amplifier OP1. Consequently, even if the load current is varied, the potential at the point P1 will not vary, and the voltage detection circuit 4 detects voltages with accuracy. |
