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백서

DDR4 PDN 시뮬레이션 및 측정: DDR4 Power Net에 대한 시뮬레이션 및 측정 비교를 위한 상관관계 연구

예상 소요 시간: 15분
S11 측정을 위해 완전 조립된 보드 그림
이 백서에서는 HyperLynx PI로 수행된 디커플링 시뮬레이션과 관련하여 PCB 전력 전달 네트워크(power delivery network, PDN)의 상관관계를 다룹니다. Siemens는 DDR4 1.2V 전원 레일의 주파수 영역 동작을 특정 주파수 범위에서 최대 목표 PDN 임피던스를 보장한다는 목표와 연계하고 있습니다. DDR4가 주류 기술로 간주되지만 많은 엔지니어는 최대 속도로 작동하는 안정적인 인터페이스를 구현하기 위해 계속 노력하고 있습니다.

Key advantages of performing DDR4 PDN simulations

DDR4 PDN simulation also offers three key advantages:

  1. All circuit nodes are controllable and observable. This is not the case with physical prototypes and can make debugging difficult.

  2. Observing circuit behavior does not disturb the circuit. Physical measurement always introduces parasitics, like probe capacitance, which alter the behavior of the system, as predicted by quantum theory.

  3. Observation of circuit behavior is ideal; for example, simulation results are not limited by probe bandwidth.

What you will learn

  • Introduction to the PCB components used and the corresponding electrical characteristics which are important for simulation and measurement.

  • How simulation is used to determine proper capacitor locations and values. It also gives recommendations to configure the software properly.

  • Details of the process used to assemble test boards.

  • Measurement methods and best practices used to guarantee good accuracy.

  • Filtering methods used to mitigate measurement noise to improve the fit between simulation and measurements.

  • The results, providing recommendations that allow readers to perform similar measurements themselves.

Learn more about HyperLynx DDRx Interface Design.

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