三极管在硬件设计及调试过程中是最基本也是最重要的元器件，对于它的替代料测试，说简单也简单，说复杂也复杂，主要看涉及的测试参数及功能。下面以具体的三极管型号替代料测试进行相关小结。 继续阅读“三极管替代料测试小结”
IO口驱动电流及灌电流小结
IO口的驱动能力决定了外围器件的设计思路，同时独立芯片的参数在初步电路设计时需要同步考虑外带负载时可能产生的情况。不能局部的去设计和验证，需要统筹全局，统一考虑设计，这样才能保证参数正确，保证设计正确。 继续阅读“IO口驱动电流及灌电流小结”
芯片启动时序及串口延时小结
实际项目实践中总会面对各种不同类型的主控芯片，有基本无需考虑启动时序的芯片，也有对启动时序要求十分苛刻的主控芯片，这些对于硬件设计人员来说都是需要仔细考虑的事项。 继续阅读“芯片启动时序及串口延时小结”
RS485通信电路分析小记
RS485电路是常见的通信串口电路，相比于RS232的全双工通信，RS485通信属于半双工通信，通信电平上也存在差异。 继续阅读“RS485通信电路分析小记”
线性稳压电压ABC~I
在实际模块产品设计工作中，对更高效、更低成本的电源解决方案一直都存在需求，本系列对电源设计应用中的思路进行了一些总结，以供温故知新。 继续阅读“线性稳压电压ABC~I”
Introduction to Electromagnetic Compatibility (EMC) II
The primary quantities of interest in EMC problems are conducted emissions [voltage in volts (V), and current in amperes (A)] and radiated emissions [electric field in volts per meter (V/m) and magnetic field in amperes per meter (A/m)]. Associated with these primary quantities are the quantities of power in watts (W) or power density in watts per square meter (W/m²). The numerical range of these quantities can be quite large. 继续阅读“Introduction to Electromagnetic Compatibility (EMC) II”
Introduction to Electromagnetic Compatibility (EMC) I
This series is concerned with the ability of these types of electromagnetic emissions to cause interference in electronic devices. This series is also concerned with the design of electronic systems such that interference from or to that system will be minimized. An electronic system that is able to function compatibly with other electronic systems and not produce or be susceptible to interference is said to be electromagnetically compatible with its environment. 继续阅读“Introduction to Electromagnetic Compatibility (EMC) I”
Sorting～Elementary Sorting Methods III
The development of a string data type implementation similar to Program 5 and 6 is of particular interest, because character strings are widely used as sort keys. 继续阅读“Sorting～Elementary Sorting Methods III”
Sorting～Elementary Sorting Methods II
Selection sort, insertion sort, and bubble sort are all quadratic-time algorithms both in the worst and in the average case, and none requires extra memory. Their running times thus differ by only a constant factor, but they operate quite differently, as illustrated in Figures 1 through 3. 继续阅读“Sorting～Elementary Sorting Methods II”