Patent ID: 7595694
Filing Date: 2009-09-29
Classification: H03F,H03G

Abstract:
1. An electronic part for high frequency power amplification, comprising: an input terminal arranged to receive a high frequency signal; a power amplifying element arranged to amplify a power of said high frequency signal received from said input terminal; an output terminal arranged to output an output power received from said power amplifying element; a control signal terminal arranged to receive an output level control signal; an output power control circuit arranged to control a level of said output power in accordance with said output level control signal; a first power supply terminal arranged to supply a first power supply voltage to said power amplifying element; and a second power supply terminal arranged to supply a second power supply voltage to said output power control circuit; wherein the output power level is a first power level at a first timing at which said first power supply voltage is being supplied to said first power supply terminal, before said second power supply voltage is supplied to said second power supply terminal, and said output level control signal is at a first signal level, wherein the output power level remains at said first power level from said first timing until a second timing at which said first power supply voltage is being supplied to said first power supply terminal, said second power supply voltage begins to be supplied to said second power supply terminal, and said output level control signal is at said first signal level, wherein said output level control signal remains at said first signal level from said second timing until a third timing at which, in response to said second power supply voltage being supplied to said second power supply terminal, the output power level is a second power level which is higher than said first power level, wherein said output level control signal remains at said first level from said third timing until a fourth timing at which said output level control signal begins to change from said first signal level, and wherein the output power level rises in accordance with changing of said output level control signal from said fourth timing until a fifth timing.