Patent ID: 8274330
Filing Date: 2012-09-25
Classification: H01L,H03F,H03K,Y10S

Abstract:
1. An RF power amplifier suitable for transmitting signals in a cellular telephone system, the RF power amplifier formed on a complementary metal oxide semiconductor (CMOS), the RF power amplifier comprising: a first switching device coupled between a first voltage supply node and a first output node; a second switching device coupled between a second output node and ground; a first inductor having first and second terminals, wherein the first terminal is coupled to the first output node and the second terminal is coupled to the second output node such that current will flow through the first inductor when the first and second switching devices are turned on; a third switching device coupled between a second voltage supply node and a third output node; a fourth switching device coupled between a fourth output node and ground; a second inductor having first and second terminals, wherein the first terminal of the second inductor is coupled to the third output node and the second terminal of the second inductor is coupled to the fourth output node such that current will flow through the second inductor when the third and fourth switching devices are turned on; wherein, during a first time period, the first and second switching devices are both turned on and the third and fourth switching devices are both turned off, such that current flows between the first and second switching devices through the first inductor, but current does not flow between the first and second switching devices through the second inductor; and wherein, during a second time period, the first and second switching devices are both turned off and the third and fourth switching devices are both turned on, such that current flows between the third and fourth switching devices through the second inductor, but current does not flow between the third and fourth switching devices through the first inductor.