一种基于抽头电感的分布式放大器

A Distributed Amplifier Based on Tapped Inductor

采用0.18μm CMOS工艺,设计了一种基于抽头电感的四级分布式放大器。采用抽头电感,减小了片上电感的数量,减小了芯片面积,在保持良好的端口阻抗匹配特性的同时提升了分布式放大器的增益。仿真结果表明,在1.48~15.5 GHz频带范围内,增益为8.6 dB,波动程度为±1.25 dB。版图面积为(0.59×1.1)mm^2。

A four-stage distributed amplifier(DA)based on tapped inductors was designed in a 0.18μm CMOS process.3-port inductors were used in the proposed DA to reduce the number of on-chip inductors,therefore the area of the circuit was reduced.The gain of the DA was improved while maintaining good impedance matching characteristics.The simulation results showed that the proposed DA achieved a 8.6 dB gain from 1.48 GHz to 15.5 GHz with the fluctuation of±1.25 dB.The layout area was(0.59×1.1)mm^2.