Patent ID: 6636118
Filing Date: 2003-10-21
Classification: H01L,H03F

Abstract:
A high frequency power amplifier module comprising:an input terminal; an output terminal; a first voltage terminal; a second voltage terminal; a bias supply terminal; a first semiconductor amplifying device having a control terminal connected to the input terminal and the bias supply terminal, a first terminal connected to the first voltage terminal, and a second terminal connected to the second voltage terminal, for supplying a signal according to a signal supplied to the input terminal from the first terminal to the output terminal; and a first protection circuit including a plurality of devices which are coupled between the first terminal and a predetermined voltage node in series so as to have a rectifying characteristic in a forward direction in accordance with a voltage at the first terminal, each of which is different from a parasitic device existing in the first semiconductor amplifying device, and each of which is formed on a semiconductor substrate with the first semiconductor amplifying device.