Method for operating a recording device powered by at least one
rechargeable accumulator
    1.
    发明授权
    Method for operating a recording device powered by at least one rechargeable accumulator 失效
    用于操作由至少一个可再充电蓄电池供电的记录装置的方法

    公开(公告)号:US5449238A

    公开(公告)日:1995-09-12

    申请号:US855023

    申请日:1994-04-15

    CPC分类号: B41J2/36

    摘要: In order to reduce the power requirement of the recording device (1) and thereby to achieve long operating readiness, the recording device (1) is placed in a stand-by state (Z3) during phases when recording is inactive, in which state its control electronics (22) function in power-saving mode. When a charger (3) is connected, the accumulator (2) is charged. The recording device (1) is placed into an operative state (Z4), if the accumulator (4) has a sufficient charge. To further reduce the power requirement, the recording device (1), from the stand-by state (Z3, is separated from the accumulator (2) by opening an electric switch (12), if it has remained in the stand-by state for a certain period of time. The state of charge of the accumulator (2) is monitored, and if it falls below a certain level and the charger (3) is disconnected, the recording device (1) is placed into the electrically shut off state (2), and if the charger (3) is connected, it is placed into the stand-by state (Z3).

    摘要翻译: PCT No.PCT / DE89 / 00699 Sec。 371日期1994年04月15日 102(e)日期1994年4月15日PCT提交1989年11月2日PCT公布。 公开号WO91 / 06430 日期为1991年5月16日。为了减少记录装置(1)的功率需求,从而实现长时间的操作准备,记录装置(1)在记录期间的阶段被置于待机状态(Z3) 无效,其控制电路(22)处于功率节省模式。 当充电器(3)连接时,蓄电池(2)充电。 如果蓄电池(4)具有足够的电量,则记录装置(1)被置于操作状态(Z4)。 为了进一步降低功率需求,记录装置(1)从备用状态(Z3)通过打开电开关(12)而与蓄电池(2)分离,如果它保持在待机状态 监视蓄能器(2)的充电状态,如果下降到一定水平以下,充电器(3)断开,记录装置(1)被置于电气关闭状态 状态(2),如果连接了充电器(3),则将其置于待机状态(Z3)。

    Circuit configuration for a D/A and A/D converter
    2.
    发明授权
    Circuit configuration for a D/A and A/D converter 失效
    D / A和A / D转换器的电路配置

    公开(公告)号:US5493300A

    公开(公告)日:1996-02-20

    申请号:US195725

    申请日:1994-02-14

    摘要: Using only one R2R network, driven by a digital logic, it is possible to implement both a D/A and A/D converter, An existing stabilized voltage V.sub.cc is used instead of a separate reference voltage source. The D/A and A/D converter is calibrated with this voltage and an operational amplifier circuited as a comparator. Starting with the known voltage value V.sub.cc and the assigned bit combination, it is possible to measure analog voltages from analog voltage sources using further operational amplifiers circuited as comparators.

    摘要翻译: 仅使用一个由数字逻辑驱动的R2R网络,可以实现D / A和A / D转换器。使用现有的稳定电压Vcc代替单独的参考电压源。 D / A和A / D转换器用该电压进行校准,运算放大器作为比较器进行校准。 从已知电压值Vcc和分配的位组合开始,可以使用作为比较器电路的其他运算放大器来测量模拟电压源的模拟电压。