| 摘要 |
PROBLEM TO BE SOLVED: To provide a constant current circuit capable of sufficiently correcting temperature even when a set current is comparatively large. SOLUTION: The constant current circuit is provided with a 1st constant current circuit having a negative temperature characteristic and a 2nd constant current circuit having a positive temperature characteristic and corrects temperature by adding the mutually opposite temperature characteristics of both the 1st and 2nd constant current circuits. Concretely the 1st constant current circuit impresses only VREF to a resistor R1 and the 2nd constant current circuit impresses VREF-VBE to a resistor R2, so that the former is provided with the negative temperature characteristic, the latter is provided with the positive temperature characteristic and temperature correction can be attained by both the constant current circuits.
|
