| 摘要 |
PURPOSE:To provide a feeder circuit in which the fluctuation width of a limit current value is small for the fluctuation of power supply voltage, regarding the feeder circuit supplying current by setting a limit to the current value for supplying to a line. CONSTITUTION:In a feeder circuit composed of a current supply part 1 outputting voltage VA increasing and decreasing according a current value to be supplied to a line 4 to a control terminal 11 and fixing the current value to a constant value to be fixed by control voltage Vc when control voltage Vc is impressed on the control terminal 11, a control voltage generation part 2 generating control voltage VC and a diode 3 becoming a conductive state when the voltage VA provided between the output terminal 21 of the control voltage generation part 2 and the control terminal 11 exceeds control voltage Vc, first and second resistances 24, 25 connected serially between the terminals 22, 23 for which a power source 5 and earth are connected, a Zener diode 26 connected in parallel with the serial circuit of the first and second resistances 24, 25 and a circuit connecting the connection point of the first and second resistances 24, 25 with an output terminal 21 are provided within the control voltage generation part 2. |
