Patent ID: 9515622
Filing Date: 2016-12-06
CPC Classification: H03F

Claim Text:
1. An apparatus comprising: a direct current voltage source; an alternating current voltage source to track a power envelope of a first radio frequency signal or a second radio frequency signal; a first power amplifier to amplify the first radio frequency signal, wherein the first power amplifier has a first bias voltage input and a first supply voltage input; a second power amplifier to amplify the second radio frequency signal, wherein the second power amplifier has a second bias voltage input and a second supply voltage input; and a switch matrix including a first input, a second input, a first output, a second output, a third output, and a fourth output, wherein the first input is coupled to the direct current voltage source, the second input is coupled to the alternating current voltage source, the first output is coupled to the first bias voltage input, the second output is coupled to the second bias voltage input, the third output is coupled to the first supply voltage input, and the fourth output is coupled to the second supply voltage input, wherein the switch matrix is configured to control an envelope-tracked signal provided, at the same time, to the first supply voltage input and the second supply voltage input, and wherein a configuration of the switch matrix enables activation of the first power amplifier, the second power amplifier, both the first and second power amplifiers, or neither power amplifier.