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    • 3. 发明授权
    • Apparatus and method for correcting microcomputer software errors
    • 微机软件错误校正的装置及方法
    • US4905200A
    • 1990-02-27
    • US237468
    • 1988-08-29
    • Richard A. PidsosnyMichael J. BurkeMark W. Jarvis
    • Richard A. PidsosnyMichael J. BurkeMark W. Jarvis
    • G06F9/26G06F9/445G06F12/06
    • G06F12/0638G06F8/66G06F9/328
    • An apparatus for replacing an undesired code stored in a plurality of storage locations in read-only memory (ROM) with a replacement code. The replacement code, including a jump-back instruction to readdress the ROM, are programmed into an EEPROM. First and second storage locations store the beginning address of the undesired code and the beginning address of the replacement code, respectively. When the beginning address of the undesired code is generated by a program counter, a comparator generates a transfer signal. In response, the beginning address of the replacement code stored in the second storage location is transferred into the program counter. Each address of the replacement code is then sequenced by the program counter until a central processing unit recognizes the jump-back instruction. The central processing unit then readdresses the ROM in response to the jump-back instruction after the entire replacement code has been executed in place of the undesired code.
    • 一种用替换代码替换存储在只读存储器(ROM)中的多个存储位置中的不期望代码的装置。 包括用于对ROM进行读取的跳转指令的替换代码被编程到EEPROM中。 第一和第二存储单元分别存储不需要代码的起始地址和替换代码的起始地址。 当不期望的代码的起始地址由程序计数器产生时,比较器产生传送信号。 作为响应,存储在第二存储位置中的替换代码的开始地址被传送到程序计数器。 然后由程序计数器对替换代码的每个地址进行排序,直到中央处理单元识别跳转指令为止。 然后,中央处理单元在执行整个替换代码之后,响应于跳回指令来代替ROM来代替不想要的代码。
    • 4. 发明授权
    • Warning circuit for indicating that an intermittently operated device
has been operated for a predetermined cumulative length of time
    • 用于指示间歇操作的装置已经以预定的累积时间长度操作的警告电路
    • US3938128A
    • 1976-02-10
    • US523088
    • 1974-11-12
    • Richard A. PidsosnyJohn Zimmer
    • Richard A. PidsosnyJohn Zimmer
    • H01H43/32G08B1/00G04F10/00
    • H01H43/327
    • A warning circuit particularly suited for indicating that an intermittently operated device has been operated for a predetermined cumulative length of time. The circuit utilizes a coulometer as a current integrator that accumulates the intermittent periods of time during which the device operates. At the end of the predetermined cumulative length of time, the impedance of the coulometer changes from a low level to a relative higher level. This change in impedance renders a first transistor conductive and results in a warning indication. A second transistor is latched into a state of conductivity that causes a feedback current to flow through the coulometer to maintain it in its high impedance condition. The warning indication is controlled by an amplifier circuit which, in turn, is controlled by the second transistor. Once the high impedance of the coulometer is achieved, the second transistor at all times retains its state of conductivity indicative of this condition, but the amplifier circuit is operative only when the intermittently operated device is in operation.
    • 一种特别适于指示间歇操作的装置已经经过预定的累积时间长度的警告电路。 该电路利用电量计作为积分器来积累器件工作的间歇时间段。 在预定的累积时间长度结束时,电量计的阻抗从低电平变化到相对较高的电平。 阻抗的这种变化使第一晶体管导通,并产生警告指示。 第二晶体管被锁存到导电性的状态,导致反馈电流流过电量计以保持其处于其高阻抗状态。 警告指示由放大器电路控制,放大器电路又由第二晶体管控制。 一旦实现了电量计的高阻抗,则第二晶体管始终保持其表示该状态的电导率状态,但是放大器电路仅在间歇操作的器件工作时才起作用。