Patent ID: 6384686
Filing Date: 2002-05-07
Classification: H03G

Abstract:
A radio communication apparatus comprising:a first semiconductor chip including a first amplifying element having an input terminal and an output terminal, and a bias circuit which provides the input terminal of the first amplifying element with a bias voltage in accordance with a power control voltage; a second semiconductor chip including a second amplifying element having an input terminal to which a signal provided from the output terminal of the first amplifying element is supplied and an output terminal which provides an output signal to be supplied to an antenna; and a control circuit coupled to the bias circuit and to the input terminal of the second amplifying element and controlling a bias voltage to the input terminal of the second amplifying element, wherein the control circuit has a first mode and a second mode, and a changing rate in the bias voltage to be provided to the input terminal of the second amplifying element for change in the bias voltage to be provided to the input terminal of the first amplifying element is different between the first mode and the second mode.