Patent ID: 11949411
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A semiconductor device comprising:
an n-channel depletion-mode transistor including a gate terminal and a source terminal;
an input matching circuit to which high-frequency power is input, which is connected to the gate terminal and a ground terminal, and inside which the gate terminal and the ground terminal are DC-connected;
a self-bias circuit including a resistor having one end connected to the source terminal and the other end connected to the ground terminal and biasing the transistor by a voltage drop due to a current flowing through the resistor, and a capacitor connected in parallel with the resistor, the capacitor functioning as a short-circuit at a frequency of the high-frequency power; and
a diode having an endmost anode connected to the source terminal and an endmost cathode connected to the ground terminal, and connected in one stage or connected in series in a plurality of stages in the same direction, wherein
the diode is connected to the source terminal or the ground terminal via another resistor.