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    • 3. 发明授权
    • Mobile transmitter and transmitting method thereof
    • 移动发射机及其发射方法
    • US08204457B2
    • 2012-06-19
    • US12111878
    • 2008-04-29
    • Byoung-Gun ChoiSeok-Bong Hyun
    • Byoung-Gun ChoiSeok-Bong Hyun
    • H03C1/62H04B17/00
    • H04B1/0483H03F1/0233H03F1/34H03F3/2176H03F3/24H03F2200/321H03F2200/324H03F2200/336H04B2001/0433
    • Provided is a mobile transmitter and a transmitting method thereof. The mobile transmitter includes a transmission circuit and a control circuit. The transmission circuit selectively operates as a polar transmitter or a direct-conversion transmitter. The control circuit controls an operation of the transmission circuit based on the level of an output signal. The mobile transmitter operates as a direct-conversion transmitter using a linear power amplifier with a high dynamic range when it transmits a low-power signal. Also, the mobile transmitter operates as a polar transmitter using a switching power amplifier with a high power efficiency when it transmits a medium-power or high-power signal. Thus, the mobile transmitter according to the present invention can provide both the high power efficiency (i.e., the advantage of the switching power amplifier) and the high dynamic range (i.e., the advantage of the linear power amplifier). Consequently, it possible to increase the battery lifetime of a personal portable communication terminal and also to implement to a compound terminal that can satisfy a variety of communication standards with a high dynamic range.
    • 提供了一种移动发射机及其发射方法。 移动发射机包括传输电路和控制电路。 传输电路选择性地作为极性发射机或直接转换发射机工作。 控制电路基于输出信号的电平来控制发送电路的动作。 当发送低功率信号时,移动发射机作为直接转换发射机使用具有高动态范围的线性功率放大器。 此外,当发送中功率或高功率信号时,移动发射机使用具有高功率效率的开关功率放大器作为极性发射机工作。 因此,根据本发明的移动发射机可以提供高功率效率(即,开关功率放大器的优点)和高动态范围(即线性功率放大器的优点)。 因此,可以增加个人便携式通信终端的电池寿命,并且还可以实现能够满足具有高动态范围的各种通信标准的复合终端。
    • 8. 发明申请
    • MOBILE TRANSMITTER AND TRANSMITTING METHOD THEREOF
    • 移动发射机及其发送方法
    • US20090061797A1
    • 2009-03-05
    • US12111878
    • 2008-04-29
    • Byoung-Gun CHOISeok-Bong Hyun
    • Byoung-Gun CHOISeok-Bong Hyun
    • H04B1/04
    • H04B1/0483H03F1/0233H03F1/34H03F3/2176H03F3/24H03F2200/321H03F2200/324H03F2200/336H04B2001/0433
    • Provided is a mobile transmitter and a transmitting method thereof. The mobile transmitter includes a transmission circuit and a control circuit. The transmission circuit selectively operates as a polar transmitter or a direct-conversion transmitter. The control circuit controls an operation of the transmission circuit based on the level of an output signal. The mobile transmitter operates as a direct-conversion transmitter using a linear power amplifier with a high dynamic range when it transmits a low-power signal. Also, the mobile transmitter operates as a polar transmitter using a switching power amplifier with a high power efficiency when it transmits a medium-power or high-power signal. Thus, the mobile transmitter according to the present invention can provide both the high power efficiency (i.e., the advantage of the switching power amplifier) and the high dynamic range (i.e., the advantage of the linear power amplifier). Consequently, it possible to increase the battery lifetime of a personal portable communication terminal and also to implement to a compound terminal that can satisfy a variety of communication standards with a high dynamic range.
    • 提供了一种移动发射机及其发射方法。 移动发射机包括传输电路和控制电路。 传输电路选择性地作为极性发射机或直接转换发射机工作。 控制电路基于输出信号的电平来控制发送电路的动作。 当发送低功率信号时,移动发射机作为直接转换发射机使用具有高动态范围的线性功率放大器。 此外,当发送中功率或高功率信号时,移动发射机使用具有高功率效率的开关功率放大器作为极性发射机工作。 因此,根据本发明的移动发射机可以提供高功率效率(即,开关功率放大器的优点)和高动态范围(即线性功率放大器的优点)。 因此,可以增加个人便携式通信终端的电池寿命,并且还可以实现能够满足具有高动态范围的各种通信标准的复合终端。