AP601

The AP601 can be configured to operate with lower bias current by varying the bias-adjust resistor R2. The recommended circuit configurations shown previously in this datasheet have the device operating with a 40 mA as the quiescent current (ICQ). This biasing level represents the best tradeoff in terms of linearity and efficiency. Lowering ICQ will improve upon the efficiency of the device, but degraded linearity. Increasing ICQ has nominal improvement upon the linearity, but will degrade the device's efficiency. Measured data shown in the plots below represents the AP601 measured and configured for 2.14 GHz applications. It is expected that variation of the bias current for other frequency applications will produce similar performance results.