| 摘要 |
An active bias compensation circuit for use with a radio frequency ("RF") power amplifier, the RF amplifier having an input (112), an output (116), a first transistor (110), and a plurality of operating performance characteristics responsive to a quiescent operating point established by a bias current in the RF amplifier. The active bias compensation circuit includes: a second transistor (120) operatively coupled to the RF amplifier and having a first, second and third terminal and further configured to have essentially the same electrical and thermal characteristics as the first transistor; and a first circuit (130) coupled between the first and second terminal of the second transistor for causing a desired quiescent operating current to be set and maintained in said RF power amplifier, independent of factors such as temperature and process variation. |
