Low current amplifier with controlled hysteresis
    2.
    发明授权
    Low current amplifier with controlled hysteresis 失效
    低电流放大器具有受控的滞后

    公开(公告)号:US4929910A

    公开(公告)日:1990-05-29

    申请号:US377033

    申请日:1989-07-10

    IPC分类号: H03F1/32 H03F3/45

    CPC分类号: H03F1/3211 H03F3/45089

    摘要: An improved amplifier with controlled hysteresis and an extremely low current drain capable of operating over a sufficiently large input voltage dynamic range is provided. Two circuits comprising a transistor and a diode are coupled between a differential amplifier and two cross-coupled current mirrors for preventing transistor saturation in the current mirrors.

    摘要翻译: 提供了具有受控滞后的改进的放大器和能够在足够大的输入电压动态范围内工作的极低电流漏极。 包括晶体管和二极管的两个电路耦合在差分放大器和两个交叉耦合电流镜之间,以防止电流镜中的晶体管饱和。

    High current driver providing battery overload protection
    3.
    发明授权
    High current driver providing battery overload protection 失效
    大电流驱动器提供电池过载保护

    公开(公告)号:US5585749A

    公开(公告)日:1996-12-17

    申请号:US363785

    申请日:1994-12-27

    摘要: A high current driver (100) for driving a high current load (110) in an electronic device powered by a battery (112) comprises a voltage reference (104) for generating a reference voltage, and a drive current controller (102, 302) responsive to a drive control signal for selectively switching the drive current controller (102, 302) from an active state for supplying current to the high current load (110), to an-inactive state for inhibiting the supply of current to the high current load (110). The drive current controller (102, 302) further controls the amount of current supplied to the high current load (110) when the battery (112) terminal voltage is substantially equal to the reference voltage. A load control element (108) is coupled to the drive current controller (102, 302) and drives the high current load (110) when the drive current controller (102, 302) is in the active state.

    摘要翻译: 用于驱动由电池(112)供电的电子设备中的高电流负载(110)的高电流驱动器(100)包括用于产生参考电压的电压基准(104)和驱动电流控制器(102,302) 响应于用于选择性地将驱动电流控制器(102,302)从用于向高电流负载(110)提供电流的有效状态切换到用于禁止向高电流负载提供电流的非活动状态的驱动控制信号 (110)。 当电池(112)端子电压基本上等于参考电压时,驱动电流控制器(102,302)进一步控制提供给高电流负载(110)的电流量。 当驱动电流控制器(102,302)处于活动状态时,负载控制元件(108)耦合到驱动电流控制器(102,302)并驱动高电流负载(110)。

    Strobed DC-DC converter with current regulation
    4.
    发明授权
    Strobed DC-DC converter with current regulation 失效
    带电流调节的Strobed DC-DC转换器

    公开(公告)号:US5028861A

    公开(公告)日:1991-07-02

    申请号:US356089

    申请日:1989-05-24

    IPC分类号: H02M3/156

    CPC分类号: H02M3/156

    摘要: A DC-DC converter regulates the maximum current through an inductor. The DC-DC converter operates within a paging receiver and boosts a voltage from a single cell battery to substantially 3.1 VDC in order to operate circuits which require more voltage than that produced by the single cell battery. Such circuits include CMOS microcomputers and code plug. The DC-DC converter is current regulated thus providing for improved power conversion efficiency. The DC-DC converter is active when the voltage is below a minimum voltage and inactive when above a maximum voltage. The DC-DC converter provides for a wide range of load currents from the converted voltage without being controlled by a microcomputer and while delivering the power to the loads with an improved efficiency.

    摘要翻译: DC-DC转换器调节通过电感器的最大电流。 DC-DC转换器在寻呼接收机内工作,并且将单个电池的电压升压至基本上为3.1VDC,以便操作需要比单电池产生的电压更多的电压的电路。 这样的电路包括CMOS微型计算机和代码插头。 DC-DC转换器是电流调节的,因此提供了改进的功率转换效率。 当电压低于最小电压时,DC-DC转换器有效,当高于最大电压时,DC-DC转换器无效。 DC-DC转换器提供来自转换电压的宽范围的负载电流,而不受微型计算机的控制,同时以更高的效率向负载供电。

    Inductively loaded switching transistor circuit
    5.
    发明授权
    Inductively loaded switching transistor circuit 失效
    感应负载开关晶体管电路

    公开(公告)号:US4961006A

    公开(公告)日:1990-10-02

    申请号:US369877

    申请日:1989-06-22

    IPC分类号: H01H47/32 H02M1/08 H03K17/042

    摘要: An inductively loaded switching transistor circuit for use in the DC-DC converter includes an inductive load and a switching transistor coupled to the inductive load for conducting current flowing therethrough when the switching transistor is on. A drive circuit is provided which is coupled to the switching transistor for supplying a drive current thereto, and feedback means are provided for adjusting the amount of base drive supplied to the switching transistor from the drive circuit. The drive current is varied substantially linearly with respect to the current flowing through the inductive load.

    摘要翻译: 用于DC-DC转换器的感应负载开关晶体管电路包括电感负载和耦合到感性负载的开关晶体管,用于当开关晶体管导通时导通电流流过其中。 提供驱动电路,其耦合到用于向其提供驱动电流的开关晶体管,并且提供反馈装置,用于调节从驱动电路提供给开关晶体管的基极驱动量。 驱动电流相对于流过感性负载的电流基本线性地变化。