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    • 6. 发明授权
    • Series-Type Doherty Amplifier Without Hybrid Coupler
    • 无混合耦合器的串联型Doherty放大器
    • US07164316B2
    • 2007-01-16
    • US10905661
    • 2005-01-14
    • Junghyun KimJoo-Min Jung
    • Junghyun KimJoo-Min Jung
    • H03F1/00H03F3/04
    • H03F1/0288H03F2200/198
    • Provided is a series type Doherty amplifier which includes a first power amplifier and a second power amplifier using a plurality of transformers. The first power amplifier and the second power amplifier are connected in series. The second power amplifier and a first transformer are connected in series. A first path is branched from a junction between the first power amplifier and the second power amplifier and a phase delay device and a second transformer are connected in series. An output port of the second transformer is connected to a junction of a second path of an output port of the second power amplifier. An efficiency of each power amplifier is determined by a ratio of 1:M in size of a final stage of each of the first and second power amplifiers.
    • 提供了一种串联型Doherty放大器,其包括第一功率放大器和使用多个变压器的第二功率放大器。 第一功率放大器和第二功率放大器串联连接。 第二功率放大器和第一变压器串联连接。 第一路径从第一功率放大器和第二功率放大器之间的结点分支,并且相位延迟装置和第二变压器串联连接。 第二变压器的输出端口连接到第二功率放大器的输出端口的第二路径的结。 每个功率放大器的效率由第一和第二功率放大器的每个的最后级的大小的1:M的比率确定。
    • 7. 发明授权
    • High linearity doherty communication amplifier with bias control
    • 具有偏置控制功能的高线性度通信放大器
    • US07053706B2
    • 2006-05-30
    • US10690923
    • 2003-10-21
    • Youngwoo KwonJunghyun Kim
    • Youngwoo KwonJunghyun Kim
    • H03F3/68
    • H03F1/0233H03F1/02H03F1/0205H03F1/0288H03F1/32H03F3/24H03F2200/102H03F2200/198H03F2200/423H03F2200/543H04B2001/045
    • The present invention relates to bias control of a power amplification circuit of a mobile device for improving the efficiency and the linearity properties of the power amplifier. In one embodiment, the power amplifier improves these properties by receiving a voltage control signal to bias a supplemental amplifier so that the power amplifier operates in a Doherty mode in a low output power range and in a non-Doherty mode in a high output power range. In the non-Doherty mode, the supplemental amplifier is biased as a class AB amplifier via the received voltage control signal to satisfy the non-linear operational requirements of the power amplifier in the high output power range. The power amplifier generates the voltage control signal based upon power levels of signals received from a remote base station.
    • 本发明涉及移动装置的功率放大电路的偏置控制,用于提高功率放大器的效率和线性特性。 在一个实施例中,功率放大器通过接收电压控制信号以偏置补充放大器来改善这些特性,使得功率放大器在低输出功率范围内的Doherty模式和在高输出功率范围内的非Doherty模式下工作 。 在非Doherty模式中,补充放大器通过接收的电压控制信号被偏置为AB类放大器,以满足功率放大器在高输出功率范围内的非线性操作要求。 功率放大器基于从远程基站接收的信号的功率电平产生电压控制信号。
    • 8. 发明申请
    • Series-Type Doherty Amplifier Without Hybrid Coupler
    • 无混合耦合器的串联型Doherty放大器
    • US20060109053A1
    • 2006-05-25
    • US10905661
    • 2005-01-14
    • Junghyun KimJoo-Min Jung
    • Junghyun KimJoo-Min Jung
    • H03F3/68
    • H03F1/0288H03F2200/198
    • Provided is a series type Doherty amplifier which includes a first power amplifier and a second power amplifier using a plurality of transformers. The first power amplifier and the second power amplifier are connected in series. The second power amplifier and a first transformer are connected in series. A first path is branched from a junction between the first power amplifier and the second power amplifier and a phase delay device and a second transformer are connected in series. An output port of the second transformer is connected to a junction of a second path of an output port of the second power amplifier. An efficiency of each power amplifier is determined by a ratio of 1:M in size of a final stage of each of the first and second power amplifiers.
    • 提供了一种串联型Doherty放大器,其包括第一功率放大器和使用多个变压器的第二功率放大器。 第一功率放大器和第二功率放大器串联连接。 第二功率放大器和第一变压器串联连接。 第一路径从第一功率放大器和第二功率放大器之间的结点分支,并且相位延迟装置和第二变压器串联连接。 第二变压器的输出端口连接到第二功率放大器的输出端口的第二路径的结。 每个功率放大器的效率由第一和第二功率放大器的每个的最后级的大小的1:M的比率确定。