小型化高性能多模式宽带合成源方案设计

针对现代电子系统和分析仪器对合成源宽频段、多频点和小体积的要求,设计了一种宽带合成源方案。在锁相环电路的基础上加入可编程逻辑控制电路,运用多模式控制锁相环(PLL)电路中的反馈分频比,使模块分别实现零、开关和串行外设接口(SPI)三种控制模式,从而获得单点频、多点频和宽频段合成源三种状态。采用Hittite 公司HMC833LP6GE 集成锁相芯片和Altera 公司EPM570T100C5 的复杂可编程逻辑器件(CPLD)控制器实现了三模式、频率范围为25 MHz ~6000 MHz,性能指标达到仪器级别的宽带合成源,包括稳压模块在内体积为60 mm×65 mm×15 mm。

The Compact High-performance Multi-mode Wide-bandFrequency Synthesizer Design

According to the requirements of the modern electronic system and analytical instrument for the wind band,multi-frequency and small volume of the synthetic source, a new method for the synthesis of broadband is introduced. Basedon PLL circuit with programmable logic control circuit, using multi-mode PLL(Phase Locked Loop) control circuit in thefeedback divider ratio, so that the module, to achieve zero, a switch and a SPI(Serial Peripheral Interface) control modes,so as to obtain a single frequency, multi-frequency and wideband synthetic source three states respectively. Using Altera''sCPLD(Complex Programmable Logic Device) to control the Hittite integrated PLL chip, obtaining the wideband syntheticsource whose frequency range is 25 MHz ~6000 MHz and performance indicators reach the instrument level.