Semiconductor device

Details Semiconductor device Semiconductor device

2009-12-28

2011-12-13

Nguyen, Hieu (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

C330S12400D

Reexamination Certificate

active

08076976

ABSTRACT:
The present invention provides a technology capable of achieving an improvement in the characteristic of a power amplifier when a power amplifier mounted onto mobile communication equipment such as a cellular phone is comprised of the balance amplifier. One feature of an embodiment resides in that each of passive parts disposed in a low-band signal negative path and each of passive parts disposed in a low-band signal positive path are placed in positions where they are symmetric with respect to a center line of a semiconductor chip. Thus, the symmetry between the low-band signal negative path and the low-band signal positive path is enhanced. As a result, a loss in matching due to the difference between the low-band signal negative path and the low-band signal positive path can be enough reduced, and the characteristic of a low-band signal balance amplifier can be enhanced.

REFERENCES:
patent: 7486134 (2009-02-01), Chang et al.
patent: 2008/0125061 (2008-05-01), Kuriyama et al.
patent: 2008-135822 (2008-06-01), None

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