Selectable PA bias temperature compensation circuitry

摘要

Radio frequency (RF) power amplifier (PA) circuitry, which transmits RF signals is disclosed. The RF PA circuitry includes a final stage, a final stage current digital-to-analog converter (IDAC), and a final stage temperature compensation circuit. A final stage current reference circuit may provide an uncompensated final stage reference current to the final stage temperature compensation circuit, which receives and temperature compensates the uncompensated final stage reference current to provide a final stage reference current. The final stage IDAC uses the final stage reference current in a digital-to-analog conversion to provide a final stage bias signal to bias the final stage. The temperature compensation provided by the final stage temperature compensation circuit is selectable.

主权项

1. Circuitry comprising:
a final stage temperature compensation circuit adapted to provide temperature compensation for an uncompensated final stage reference current to provide a final stage reference current, such that the temperature compensation is selectable; a final stage current digital-to-analog converter (IDAC) adapted to use the final stage reference current in a digital-to-analog conversion to provide a final stage bias current to bias a final stage; and the final stage adapted to receive and amplify a radio frequency (RF) input signal to provide an RF output signal.