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文中论述了机载(数字式)计算机中离散量接口功能模块的设计方法,设计要求在满足基本功能需求的基础上,应通过元器件选型、降额、鲁棒性提升等措施来满足整机对模块的可靠性要求。可测试性设计要求设计人员在完成电路的设计过程中不仅需要做到功能实现的完备,同时要求所设计的模块能够便利快捷地完成测试任务。安全性设计方面,在机载应用环境下用于指示故障的离散量必须能够及时确切地申报出故障状态以触发告警提示,文中给出了一种具有确切指示能力的离散信号申报电路的设计方法。全文从基本功能、可测试性、可靠性、安全性等几方面论述了离散量接口功能电路的设计思想并给出了原理框图可供设计人员参考。
This paper discusses the design method of discrete interface function module in airborne (digital) computer. The design requirements meet the requirements of basic functions and should meet the requirements of component selection, derating and robustness improvement Machine reliability requirements for the module. Testability design requires designers to complete the circuit design process not only need to achieve the completeness of the function, at the same time require the design of the module can quickly and easily complete the test task. In terms of safety design, the discrete quantities used to indicate faults in airborne application environment must be able to declare the fault state in time to trigger the alarm prompt. In this paper, a design method of discrete signal reporting circuit with exact indication capability is given . The full text discusses the design concept of discrete interface functional circuit from basic functions, testability, reliability and safety, and gives the block diagram for reference of designers.