小型化脉冲调制介质振荡电路研究  

Research on Miniaturized Pulse Modulation Medium Oscillating Circuit

作　　者：陈书明 林恒[2] CHEN Shuming;LIN Heng(China Key System&Integrated Circuit Co.,Ltd.,Wuxi 214072,China;Wuxi Hope Microelectronics Co.,Ltd.,Wuxi 214035,China)

机构地区：[1]中科芯集成电路有限公司,江苏无锡214072 [2]无锡华普微电子有限公司,江苏无锡214035

出　　处：《电子与封装》2020年第9期33-37,共5页Electronics & Packaging

摘　　要：介绍了λ/4同轴介质谐振器工作原理,电路中谐振器等效为并联谐振单元,与耦合电容及反馈电容构成电容三点式西勒振荡电路,分析研究了耦合电容及反馈电容变化对频率温度系数、起振延时及输出功率的影响。优化选择适当的电容值,设计出1090 MHz脉冲信号调制振荡电路,在-55^+85℃温度范围,脉冲调制延时≤1μs,输出功率为(5±2)dBm,输出频率为1090 MHz±800 kHz,工作电流小于40 mA。产品采用20.4 mm×12.8 mm SMD封装,质量小于5g,具有体积小、重量轻、功耗低等特点。The working principle ofλ/4 coaxial dielectric resonator is introduced.The resonator in the circuit is equivalent to a parallel resonant unit,which forms a capacitance three-point Siler oscillator circuit with coupling capacitance and feedback capacitance.The influence of coupling capacitance and feedback capacitance changes on the frequency temperature coefficient,start-up delay and output power is analyzed and studied.The appropriate capacitance value is optimally selected.A 1090 MHz pulse signal modulation oscillator circuit is designed.In the temperature range of-55-+85℃,the pulse modulation delay is equal toorless than 1μs,the output power is(5±2)dBm,the output frequency is 1090 MHz±800 kHz,and the working current is less than 40 mA.The product is packaged in 20.4 mm×12.8 mm SMD,and the mass is less than 5 g.It has the characteristics of small volume,light weight,low power consumption,etc.

关 键 词：西勒振荡电路 同轴介质谐振器 脉冲调制 调制延时 频率温度系数 

分 类 号：TN75[电子电信—电路与系统]