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    STANDBY POWER SUPPLY CIRCUIT FOR 2-WIRE BUS INTERCOM SYSTEM AND APPARATUS THEREOF
    1.
    发明申请
    STANDBY POWER SUPPLY CIRCUIT FOR 2-WIRE BUS INTERCOM SYSTEM AND APPARATUS THEREOF 有权
    2线总线系统的备用电源电路及其设备

    公开(公告)号：US20140252861A1

    公开(公告)日：2014-09-11

    申请号：US14348085

    申请日：2012-04-16

    申请人： Dalin Zhou ,  Yangpeng Zhang ,  Mingyuan Liu ,  Huaping Li ,  Zhitian Ye

    发明人： Dalin Zhou ,  Yangpeng Zhang ,  Mingyuan Liu ,  Huaping Li ,  Zhitian Ye

    IPC分类号： H02J4/00

    CPC分类号： H02J9/005 ,  G05F1/46 ,  H02J4/00 ,  H04M19/00 ,  Y10T307/615

    摘要： The present invention discloses a standby power supply circuit for a 2-wire bus intercom system and an apparatus thereof. The standby power supply circuit is separated into two power supply modules; in which the first power supply module is a power supply to standby circuit and the second power supply module is a power supply to operation circuit; said power supply to operation circuit is switched off by a constant current switch when the device load is at the standby status; and said power supply to standby circuit comprises a constant current circuit whose alternating current impedance is very large. The solutions of the present invention achieve larger alternating current impedance for the 2-wire intercom system, which can offer sufficient power for many device loads both in the conditions of operation and standby statuses.

    摘要翻译： 本发明公开了一种用于2线总线对讲系统的备用电源电路及其装置。 备用电源电路分为两个电源模块; 其中第一电源模块是备用电路的电源，第二电源模块是运行电路的电源; 当设备负载处于待机状态时，通过恒流开关断开操作电路的电源; 并且所述待机电路的电源包括其交流阻抗非常大的恒流电路。 本发明的解决方案为2线对讲系统实现更大的交流阻抗，其可以在操作条件和待机状态下为许多设备负载提供足够的电力。