Patent ID: 9479209
Filing Date: 2016-10-25
CPC Classification: H04B,H04M,H04W

Claim Text:
1. Apparatus comprising: a first radio modem having an associated first radio frequency power amplifier; a second radio modem having an associated second radio frequency power amplifier; a terminal for connection to a battery; a capacitor having first and second terminals; a first current limiting switch having input and output terminals; and a first direct current-direct current converter having an input and an output, wherein: the terminal is coupled to the input of the first current limiting switch, the output of the first current limiting switch is coupled to both the first terminal of the capacitor and the input of the first direct current-direct current converter, and the output of the first direct current-direct current converter is coupled to the second radio frequency power amplifier; the apparatus further comprising a second capacitor having first and second terminals; a second current limiting switch having an input and an output; and a second direct current-direct current converter having an input and an output, wherein: the terminal is coupled to the input of the second current limiting switch, the output of the second current limiting switch is coupled to both the first terminal of the second capacitor and the input of the second direct current-direct current converter, and the output of the second direct current-direct current converter is coupled to the first radio frequency power amplifier; wherein for a case where the first radio frequency power amplifier and the second radio frequency power amplifier each simultaneously transmit at substantially full power the first current limiting switch is operated so as to provide a current flow from the battery to the input of the first direct current-direct current converter and the second current limiting switch is operated so as to provide a current flow from the battery to the input of the second direct current-direct current converter, and wherein each of the first radio modem and the second radio modem is a burst transmission modem.