The design concept of semiconductor optical amplifier(SOA)and gain chip used in wavelength tunable lasers(TL)is discussed in this paper.The design concept is similar to that of a conventional SOA or a laser;however,th...The design concept of semiconductor optical amplifier(SOA)and gain chip used in wavelength tunable lasers(TL)is discussed in this paper.The design concept is similar to that of a conventional SOA or a laser;however,there are a few different points.An SOA in front of the tunable laser should be polarization dependent and has low optical confinement factor.To obtain wide gain bandwidth at the threshold current,the gain chip used in the tunable laser cavity should be something between SOA and fixed-wavelength laser design,while the fixed-wavelength laser has high optical confinement factor.Detailed discussion is given with basic equations and some simulation results on saturation power of the SOA and gain bandwidth of gain chip are shown.展开更多
针对采用有源相控阵技术的高分辨率合成孔径雷达(SAR)应用要求,设计制作了一款尺寸小、重量轻、厚度薄、可与片式天线阵面相兼容的片式T/R组件,对该片式T/R组件的接收和发射电路、垂直互连性能进行了仿真分析,并对该T/R组件样机进行测...针对采用有源相控阵技术的高分辨率合成孔径雷达(SAR)应用要求,设计制作了一款尺寸小、重量轻、厚度薄、可与片式天线阵面相兼容的片式T/R组件,对该片式T/R组件的接收和发射电路、垂直互连性能进行了仿真分析,并对该T/R组件样机进行测试验证,在X波段获得的测试结果为:接收增益大于24 d B,噪声系数小于3d B,发射功率大于1 W,垂直互连的端口驻波小于1.35,垂直互连的插损小于0.2 d B。尺寸仅为10 mm×10 mm×5mm,可应用于相关工程中。展开更多
设计了一款无需片外电容的LDO电路,根据负载不断变化的问题,设计了零极点跟踪补偿电路,使产生的零点有效补偿电路的极点,保证了LDO环路的稳定性。基于TSMC 0.18μm Flash工艺完成电路和版图的设计以及流片。电路仿真以及实测结果表明在...设计了一款无需片外电容的LDO电路,根据负载不断变化的问题,设计了零极点跟踪补偿电路,使产生的零点有效补偿电路的极点,保证了LDO环路的稳定性。基于TSMC 0.18μm Flash工艺完成电路和版图的设计以及流片。电路仿真以及实测结果表明在无片外电容的情况下,环路的相位裕度能够达到78.9°,达到高稳定的需求,最大负载电流能够达到100 m A,负载调整率为0.2 m V/m A。展开更多
文摘The design concept of semiconductor optical amplifier(SOA)and gain chip used in wavelength tunable lasers(TL)is discussed in this paper.The design concept is similar to that of a conventional SOA or a laser;however,there are a few different points.An SOA in front of the tunable laser should be polarization dependent and has low optical confinement factor.To obtain wide gain bandwidth at the threshold current,the gain chip used in the tunable laser cavity should be something between SOA and fixed-wavelength laser design,while the fixed-wavelength laser has high optical confinement factor.Detailed discussion is given with basic equations and some simulation results on saturation power of the SOA and gain bandwidth of gain chip are shown.
文摘针对采用有源相控阵技术的高分辨率合成孔径雷达(SAR)应用要求,设计制作了一款尺寸小、重量轻、厚度薄、可与片式天线阵面相兼容的片式T/R组件,对该片式T/R组件的接收和发射电路、垂直互连性能进行了仿真分析,并对该T/R组件样机进行测试验证,在X波段获得的测试结果为:接收增益大于24 d B,噪声系数小于3d B,发射功率大于1 W,垂直互连的端口驻波小于1.35,垂直互连的插损小于0.2 d B。尺寸仅为10 mm×10 mm×5mm,可应用于相关工程中。
基金National Natural Science Foundation of China(No.62204127)the Natural Science Foundation of Jiangsu Province(No.BK20215093)State Key Laboratory of Luminescence and Applications(No.SKLA‒2021‒04)。
文摘设计了一款无需片外电容的LDO电路,根据负载不断变化的问题,设计了零极点跟踪补偿电路,使产生的零点有效补偿电路的极点,保证了LDO环路的稳定性。基于TSMC 0.18μm Flash工艺完成电路和版图的设计以及流片。电路仿真以及实测结果表明在无片外电容的情况下,环路的相位裕度能够达到78.9°,达到高稳定的需求,最大负载电流能够达到100 m A,负载调整率为0.2 m V/m A。
