| 摘要 |
In a semiconductor integrated circuit apparatus and a radio-frequency power amplifier module, a log detection portion including multiple-stage amplifier circuits, multiple level detection circuits, adder circuits, and a linear detection portion including a level detection circuit are provided. Output current from the log detection portion and output current from the linear detection portion are multiplied by different coefficients and the results of the multiplication are added to each other to realize the multiple detection methods. For example, current resulting from multiplication of the output current from the log detection portion by ×6/5 is added to the output current from the linear detection portion to realize a log detection method and, current resulting from multiplication of the output current from the log detection portion by ×1/5 is added to current resulting from multiplication of the output current from the linear detection portion by ×3 to realize a log-linear detection method. |
