Feed-forward biasing for RF amplifiers

摘要: Bias circuitry is configured to adjust bias current one or more power amplifier stages based upon the level of RF signal be amplified. A feed-forward circuit senses input amplified and dynamically adjusts for amplifiers in amplification path ensure each operating a linear region given level. For configurations having multiple stages, provides proportional currents stage as necessary progressively increasing levels being The eliminates excessive quiescent that prior biasing techniques required operation by automatically only needed on effective magnitude