| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power amplification circuit that has a bias circuit with a temperature compensation circuit for suppressing temperature dependence of a gain of the power amplification circuit. <P>SOLUTION: The power amplification circuit that has an amplifying transistor having a drain connected to a high potential and a source grounded and controls a bias current to the amplifying transistor by means of a current mirror transistor CMTr having a source grounded and a gate connected to a gate of the amplifying transistor GTr includes: a first diode D1 having an anode connected to a control power terminal; a second diode D2 having an anode coupled to a cathode of the first diode D1 and a cathode connected to a drain of the current mirror transistor CMTr; a first resistive element R1 having one terminal connected to the cathode of the second diode D2 and the other terminal grounded; and a second resistive element R2 connected in parallel with the second diode D2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
