Patent ID: 7378912

Claim:
A cascode connection circuit comprising: a first field effect transistor (FET) which has a source terminal, a gate terminal, and a drain terminal, the source terminal being connected to ground; a second FET which has a source terminal, a gate terminal, and a drain terminal, the source terminal being connected to the drain terminal of the first FET; a first resistor having a resistance and a first capacitor having a capacitance connected in series between the source terminal of the first FET and the gate terminal of the second FET, wherein, the first FET and the second FET are cascode-connected to each other, and the product of the resistance of the first resistor and the capacitance of the first capacitor does not exceed 0.1 times the period of an operating frequency of the circuit; a second resistor connected between the drain terminal of the second FET and the gate terminal of the second FET; and a third resistor connected in parallel with the first resistor and first capacitor, between the source terminal of the first FET and the gate terminal of the second FET.