Patent ID: 6480700
Filing Date: 2002-11-12
Classification: H04W,Y02D

Abstract:
In a radio device operable in a radio communication system to communicate radio-frequency communication signals, an improvement of apparatus for operating the radio device at selected radio characteristics, said apparatus comprising:a first amplifier element coupled to receive a first radio frequency signal, said first amplifier based by a first-bias current signal of a first selectable biasing level, said first amplifier element generating a first amplified radio frequency signal exhibiting a first level of linearity, the first level of linearity responsive to the first-bias current signal; and a second amplifier element coupled to receive indications of the first amplified radio frequency signal generated by said first amplifier element, said second amplifier element selectably operable in a large-signal mode and in a small signal mode, said second amplifier operated in the large-signal mode when the indications of the first amplified radio frequency signal applied thereto is at least as great as a threshold value such that, when operated in the large-signal mode, said second amplifier become self-biased at a fixed gain level.