电气工程师

In PCB design, an Electrical Engineer is a highly skilled professional who specializes in designing electrical circuits using schematic capture software. They are responsible for researching, selecting, and procuring parts for circuits, as well as simulating results to ensure optimal performance. Depending on the size of their team, some Electrical Engineers may also handle PCB layout, create component libraries, and generate PCB documentation.

Electrical Engineers in PCB design may also be referred to by other job titles, such as Electronics Engineer, Senior Electrical Engineer, or Electronics Designer. These titles reflect the broad range of skills and expertise required for success in this role, from circuit design and simulation to PCB layout and documentation. Overall, Electrical Engineers play a critical role in the PCB design industry, ensuring that products meet necessary standards and are delivered to customers on time and with the highest level of quality and functionality.

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嵌入式系统中的外设启动与复位控制 嵌入式系统中的外设启动与复位控制 1 min Blog 电气工程师 电气工程师 电气工程师 即使原理图连接正确,由 MCU 控制的使能信号仍然可能引发启动问题。GPIO 可能会在受控器件的电源、参考电压或上游电路尚未准备就绪之前,就达到所需的逻辑电平。根据器件的启动要求,这种时序关系可能会阻止初始化,或导致出现非预期状态。事后进行测量时,可能会看到电源正常且使能信号已被置位,但却无法观察到导致故障的那个关键跃迁。 混合信号处理器提供了一种方法,可在将 MCU 的命令传递到器件的使能输入之前,先对其进行条件判定。与其直接将使能翻转信号发送到外设,不如由混合信号处理器承担监控角色,判断是否应将使能信号传递到使能引脚。虽然这也可以通过分立逻辑和模拟前端来实现,但混合信号处理器能够将这些组件整合到单一封装中。 如何监控使能时序 确保外设上的使能引脚在正确的时间窗口内切换,可能涉及多种解决方案;每种方案对逻辑处理能力的要求不同,而且并非每种主机控制器都支持: 通过缓冲器以固定时间间隔延迟使能翻转信号 通过缓冲器以固定时钟周期数延迟使能翻转信号 监测所需电源轨以确保其稳定,然后再传递使能翻转信号 监测其他某个信号以确保其幅度或状态合适,然后再传递使能翻转信号 受控外设的数据手册通常会规定电源与使能/复位时序之间的关系。然而,其他可能影响时序的因素(其他信号、电源稳定过程等)往往不可预测,因为这需要监测另一部分电路,因此无法一概而论地确定使能信号的时序。 固定延迟 在大多数情况下,当需要进行电源监测时,会采用方案 1,并施加较长的延迟以保证电源充分稳定。方案 2 有时并不可行,因为它要求 MCU 阅读文章