A 5.8GHz high P1dB and low quiescent current SiGe HBT three-stage power amplifier (PA) MMIC using a self base bias control circuit is described. The self base bias control circuits are applied to the second and the final stage PA's, and automatically control the base current/voltage according to the output power level. As a result, high P1dB is obtained at a low quiescent current condition. The simulated results show that the proposed three-stage PA MMIC achieves P1dB improvement of 1.7dB compared with a conventional PA using a constant base voltage bias circuit at the same quiescent current condition. The fabricated PA MMIC achieves P 1dB of 15.3dBm, gain of 19.6dB with the quiescent current of 22.2mA at 5.8GHz.
|Number of pages||4|
|Publication status||Published - 2003|
|Event||2003 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium - Philadelphia, PA, United States|
Duration: 2003 Jun 8 → 2003 Jun 10
|Conference||2003 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium|
|Period||03/6/8 → 03/6/10|