PickHDB3 yards ( third-order high-density dual polarity yards) is the most commonly used in modern transmission system is one of the MaXing， is widely This study is based on the main content of the HDB3 yards encoder CPLD device First of HDB3 yards and CPLD application and research status were introduced， This paper used to MaxPlusII and VHDL language software， Finally HDB3 yards are analyzed in detail by VHDL language encoding principle and realization Based on the principle of coding HDB3 yards， the paper analyzes the design scheme of HDB3 code design mainly divided into three coder realized module ( insert V module， modeling and realize the modeling and realization， B module modeling and realize polarity transform module) After completion， the software design in the simulation， MaxPlus2 test results and the design idea of early， so right， completed based on simulation HDB3 code design of CPLD Keywords: HDB3， VHDL， Polarity transformation
This subject introduces a kind of nc dc voltage stabilizer， the power supply， by simulation showed circuit， control circuit and digital-to-analog circuit， amplifying circuit four parts， mainly is a set of singlechip intelligent dc power Accurate analog power is to provide power， digital chip， amplifiers， microcontroller is the voltage required by A/D sampling data output voltage， and comparison， if there is A deviation is the limit， adjust output signal output and closure， alarm， The working process of the working status， manostat by SCM outputs drive LED display， Display circuit used to display the size of the output voltage of While the digital technology and the simulation analysis of the concept of technical This topic is a kind of based on singlechip intelligent high-precision dc power supply of simple design， this power can use digital adjustment， the closed-loop real-time monitoring， high precision， and the output of both double overload protection and alarm functions， applicable to all have high accuracy requirements of the It compared with traditional manostat with easy operation， high stability of power and its output voltage size using digital display
HDB3 yards ( third-order high-density dual polarity yards) is the most commonly used in modern transmission system is one of the MaXing， is widely This study is based on the main content of the HDB3 yards encoder CPLD device First of HDB3 yards and CPLD application and research status were introduced， This paper used to MaxPlusII and VHDL language software， Finally HDB3 yards are analyzed in detail by VHDL language encoding principle and realization Based on the principle of coding HDB3 yards， the paper analyzes the design scheme of HDB3 code design mainly divided into three coder realized module ( insert V module， modeling and realize the modeling and realization， B module modeling and realize polarity transform module) After completion， the software design in the simulation， MaxPlus2 test results and the design idea of early， so right， completed based on simulation HDB3 code design of CPLD
