| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device which is compact, light-weight, and inexpensive and is hard to be destroyed even if it is applied with excessive power. SOLUTION: A current limiting circuit 12 is connected to the gate (input terminal) of a transistor 11 for amplification. The current limiting circuit 12 includes a protection transistor 13, a first protection resistor 14 for connecting the drain and gate of the protection transistor 13, and a second protection resistor 15 for connecting the source and gate of the protection transistor 13. The current limiting circuit 12 limits a current flow in such a manner that power larger than the maximum allowable power of the transistor 11 for amplification may not flow thereinto. COPYRIGHT: (C)2009,JPO&INPIT |
