| 摘要 |
PURPOSE:To obtain a pulse power source for CO2 laser having a structure which prevents a constant current element composed of a semiconductor from being burnt by putting a semiconductor-impressed voltage value inside a detector simultaneously with discharged pulses and causing direct current voltage values to be unified so that the voltage value applied to semiconductor may be settled down within the limits of a set point established in advance. CONSTITUTION:When pulses are applied to a control terminal 31 of a semiconductor device 3 by a pulse generator 4, constant current characteristics are obtained by developing a resistance 4A under electric action that is well know as a cathode follower (or emitter follower) in general. A voltage V applied to a connection point 5 at every discharged pulse is obtained by a detector 6 and when its voltage becomes higher than that of reference, the voltage of a direction current power source 1 is controlled by the voltage developed from a voltage output terminal 63 so as to lower is its voltage. Thus, this approach helps avoid burning the semiconductor device 3 due to overload. |
