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    • 1. 发明授权
    • Selective call receiver having CMOS power-on reset circuit
    • 具有CMOS上电复位电路的选择性呼叫接收机
    • US5349695A
    • 1994-09-20
    • US984827
    • 1992-12-03
    • Zhong K. ZhongBarry W. Herold
    • Zhong K. ZhongBarry W. Herold
    • H03K17/22H04W52/02H04W88/02H04Q3/02H03K17/30
    • H03K17/223H04W52/028H04W88/022
    • A selective call receiver (100) operates to recover an information signal and is capable of receiving a battery supplying a first voltage (203) that is multiplied to generate a second voltage (212). The selective call receiver (100) includes [comprises] a processor (106) that extracts message information contained within the recovered information signal for presentation and a power-on reset circuit (112) that generates a power-on reset signal having [comprising] first and second portions corresponding with a processor reset and a processor execute state, respectively. The power-on reset signal changes from the processor reset to the processor execute state when the second voltage (212) exceeds a sum of a PMOS threshold voltage and a NMOS threshold voltage, thereby completing a power-on reset of the processor (106).
    • 选呼接收机(100)操作以恢复信息信号,并且能够接收提供被乘以以产生第二电压(212)的第一电压(203)的电池。 选择呼叫接收机(100)包括[包括]提取包含在所恢复的信息信号中以用于呈现的消息信息的处理器(106)和产生具有[包含]的上电复位信号的上电复位电路(112) 分别对应于处理器复位和处理器执行状态的第一和第二部分。 当第二电压(212)超过PMOS阈值电压和NMOS阈值电压之和时,上电复位信号从处理器复位变为处理器执行状态,从而完成处理器(106)的上电复位, 。
    • 2. 发明授权
    • Method and apparatus for low voltage CMOS start circuit
    • 低压CMOS启动电路的方法和装置
    • US5612861A
    • 1997-03-18
    • US504360
    • 1995-07-19
    • Zhong K. ZhongDaniel Tran
    • Zhong K. ZhongDaniel Tran
    • H02M3/07H02M7/25H02M7/517
    • H02M3/07
    • A method and apparatus for low voltage start circuit is provided. The start circuit (140) includes a first voltage converter (203) having a first booster circuit (210) and a first voltage multiplier (220) for converting a DC battery voltage to a converted DC voltage. The converted DC voltage is connected to an input of a second booster circuit (230) of a second voltage converter (205). The second voltage converter (205) includes the second booster circuit (230) and a second voltage multiplier (240). An output of the second voltage multiplier (240) is fed back to the input of the second booster circuit (230) for boosting the converted DC voltage to a predetermined threshold value. A voltage detector (136) compares the converted DC voltage to the predetermined threshold value. A controller (141) disables the start circuit (140) and enables a main DC-DC conversion circuit of the pager (100) when the converted DC voltage reaches the predetermined threshold value.
    • 提供了一种低压启动电路的方法和装置。 起动电路(140)包括具有第一升压电路(210)和第一电压倍增器(220)的第一电压转换器(203),用于将直流电池电压转换成转换后的直流电压。 经转换的直流电压连接到第二电压转换器(205)的第二升压电路(230)的输入端。 第二电压转换器(205)包括第二升压电路(230)和第二电压倍增器(240)。 第二电压倍增器(240)的输出反馈到第二升压电路(230)的输入,用于将转换后的直流电压升压到预定的阈值。 电压检测器(136)将转换的DC电压与预定阈值进行比较。 当变换的直流电压达到预定阈值时,控制器(141)禁用启动电路(140)并使能寻呼机(100)的主DC-DC转换电路。