| 摘要 |
PROBLEM TO BE SOLVED: To provide a current control circuit consisting of new constitution using a general operational amplifier having a narrow response range without using any rail-to-rail type operational amplifier. SOLUTION: In the current control circuit for controlling a load current to be fed to a load RL by using an operational amplifier A1 capable of inputting negative feedback voltage from a load current detection means Rcs to one input terminal, a reference voltage source-Vref for applying reference voltage included in the response range of the amplifier A1 as compared with the reference potential point of a power source Vcc is connected to the other input terminal of the amplifier A1 and a control voltage source Va for applying control voltage for shifting negative feedback voltage from the detection means Rcs to the response range of the amplifier A1 is connected to one input terminal of the amplifier A1.
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