| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor circuit device capable of reducing variation of a reference voltage due to radiation exposure.SOLUTION: A semiconductor circuit device is a reference voltage circuit device in which a depletion type MOSFET2 and an enhancement type MOSFET1 are serially connected, and a difference of a threshold voltage of the depletion type MOSFET2 and the enhancement type MOSFET1 is set to a reference voltage. In the depletion type MOSFET2, a drain is connected to power supply terminal Vs, and a gate is connected to a source. In the enhancement type MOSFET1, the source is connected to a ground terminal Gnd, and the gate is connected to the drain. A resistor 3 or the depletion type MOSFET are serially connected between the depletion type MOSFET2 and the enhancement type MOSFET1. By the resistor or depletion type MOSFET, an increase amount of a current amount due to the radiation exposure is converted to a voltage, and a decrease amount of an output voltage due to the radiation exposure is compensated.SELECTED DRAWING: Figure 1 |
