High frequency switch circuit

摘要

One end of each of five resistors (205-209) is connected to each of the two ends (301,302) and the respective intermediate points of a cascade of four depression-type FETs (101-104), while the other ends (402) of the five resistors are provided with a predetermined voltage. This configuration fixes the source-drain potential of the four FETs. This fixing of the source-drain potential of the FETs permits stable application of a bias voltage for turning ON the FETs between the gate and the source each FET, so as to ensure the ON-OFF switching of the FETs.