| abstract |
The present invention provides a technique capable of improving the characteristics of a balance amplifier when a power amplifier mounted on a mobile communication device such as a mobile phone is constituted by a balance amplifier. One of the features of the embodiment is that a passive component arranged in a low-band signal negative path and a passive component arranged in a low-band signal positive path are connected to a center line CL1 of a semiconductor chip CHP. It is to be arranged at a symmetrical position. This improves the symmetry between the low-band signal negative path and the low-band signal positive path. As a result, the matching loss due to the path difference between the low-band signal negative path and the low-band signal positive path can be sufficiently reduced, and the characteristics of the low-band signal balance amplifier can be improved. [Selection] Figure 11 |