Zhou Shaohua, Yang Cheng, Wang Jian
School of Microelectronics, Tianjin University, Tianjin 300072, China.
Qingdao Institute for Ocean Technology, Tianjin University, Qingdao 266200, China.
Micromachines (Basel). 2022 Jul 22;13(8):1162. doi: 10.3390/mi13081162.
The specification of power amplifiers (PA) is closely related to humidity variation, and few reports on the humidity properties of PA are available in the literature. Therefore, an experimental study of PA specifications was conducted under different humidity conditions to elucidate the relationship between the degradation of PA specifications and humidity conditions. This paper studies and provides results of the degradation of a PA subjected to different humidity levels. The experimental results show that the S and output power decrease with the increase in humidity. The main cause of this degradation is the decrease in oxide capacitance and increase in threshold voltage with increasing humidity, resulting in a reduction of transconductance and an increase in on-resistance. The results of this study can guide designers in designing compensation circuits to achieve some degree of compensation for the degradation of PA specifications.
功率放大器（PA）的规格与湿度变化密切相关，而文献中关于PA湿度特性的报道很少。因此，在不同湿度条件下对PA规格进行了实验研究，以阐明PA规格退化与湿度条件之间的关系。本文研究并给出了PA在不同湿度水平下的退化结果。实验结果表明，随着湿度的增加，S参数和输出功率降低。这种退化的主要原因是随着湿度增加，氧化物电容减小，阈值电压增大，导致跨导降低和导通电阻增加。本研究结果可为设计人员设计补偿电路提供指导，以实现对PA规格退化的一定程度补偿。
