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1. 发明授权

US6060949A High efficiency switched gain power amplifier 有权
标题翻译：高效开关增益功率放大器
公开(公告)号：US6060949A
公开(公告)日：2000-05-09
申请号：US158456
申请日：1998-09-22
申请人： Ralph Kaufman , Darin Hunzeker , Richard J. Camarillo
发明人： Ralph Kaufman , Darin Hunzeker , Richard J. Camarillo
IPC分类号： H03F3/24 , H03F1/02 , H03F1/14 , H03F3/60 , H03F3/68 , H03F3/72 , H03G1/00 , H04B1/04 , H04Q7/32
CPC分类号： H03F3/72 , H03F3/602 , H03G1/0088 , H03F2203/7231 , H03F2203/7239
摘要： A power amplifier circuit arrangement including a power amplifier, and a bypass network for bypassing an RF-input signal around the power amplifier when excess gain and output power are not needed. When the bypass network is used, the power amplifier is turned off. A circulator connects the bypass network to the power amplifier output, thus removing the requirement of an output switch. The RF-input signal enters the circulator which routes the signal toward the output of the power amplifier. Because the amplifier is off, its output appears as a high impedance and reflects the signal back to the circulator. The circulator routes the reflected signal the signal output.
摘要翻译：一种功率放大器电路装置，包括功率放大器和旁路网络，用于在不需要额外的增益和输出功率时旁路功率放大器周围的RF输入信号。当使用旁路网络时，功率放大器关闭。循环器将旁路网络连接到功率放大器输出，从而消除了输出开关的要求。 RF输入信号进入循环器，将信号路由到功率放大器的输出。由于放大器关闭，其输出显示为高阻抗，并将信号反射回循环器。循环器将反射信号传送到信号输出端。

2. 发明授权

US06208202B1 High efficiency switched gain power amplifier 有权
标题翻译：高效开关增益功率放大器
公开(公告)号：US06208202B1
公开(公告)日：2001-03-27
申请号：US09248048
申请日：1999-02-10
申请人： Ralph E. Kaufman , Darin Hunzeker , Richard J. Camarillo
发明人： Ralph E. Kaufman , Darin Hunzeker , Richard J. Camarillo
IPC分类号： H03F114
CPC分类号： H03F3/72 , H03F3/602 , H03F2203/7231 , H03F2203/7239 , H03G1/0088
摘要： A power amplifier circuit arrangement including a driver amplifier, a switch, an amplifier path having a band pass filter and a power amplifier, and a bypass path which bypasses the power amplifier when excess gain and output power are not needed. When an RF-analog signal from the driver amplifier is switched to the amplifier path, the signal is band-pass filtered and amplified. Then the signal is split into an in-phase and a quadrature signal. Either the in-phase or the quadrature signal is inverted and summed with the other of the in-phase or quadrature signal, and the summed signal is transmitted to an output port. When the RF-signal from the driver amplified is switched to the bypass path, the power amplifier is turned off and the bypass path directs the signal to the output of the power amplifier, which appears as a high impedance to the signal. The signal reflects off the power amplifier to the output port. This design preserves the benefits of bypassing the power amplifier by reducing the amount of switching loss introduced into the circuit.
摘要翻译：包括驱动器放大器，开关，具有带通滤波器的放大器路径和功率放大器的功率放大器电路装置以及当不需要过量增益和输出功率时旁路功率放大器的旁路路径。当来自驱动放大器的RF模拟信号切换到放大器路径时，该信号被带通滤波和放大。然后将信号分成同相和正交信号。同相或正交信号被反相并与同相或正交信号中的另一个相加，并且求和的信号被发送到输出端口。当放大的驱动器的RF信号切换到旁路路径时，功率放大器关闭，旁路路径将信号引导到功率放大器的输出端，功率放大器的输出显示为信号的高阻抗。该信号将功率放大器反射到输出端口。这种设计保留了通过减少引入电路的开关损耗量绕过功率放大器的好处。

3. 发明授权

US06766157B1 Reducing LO leakage in a direct conversion receiver quadrature stage 失效
标题翻译：在直接转换接收器正交阶段减少LO泄漏
公开(公告)号：US06766157B1
公开(公告)日：2004-07-20
申请号：US09754104
申请日：2001-01-03
申请人： Darin Hunzeker , Ralph Kaufman
发明人： Darin Hunzeker , Ralph Kaufman
IPC分类号： H04B110
CPC分类号： H03D3/008
摘要： An LO leakage canceller for a direct conversion receiver is disclosed. The canceller includes an RF input stage operating to provide at least two input signals, a local oscillator, an in-phase processor, and a quadrature processor. The local oscillator is configured to produce at least two reference signals for modulating the two input signals. Each of the in-phase and quadrature processors includes two consecutive quadrature splitters operating to substantially reduce leakage of the reference signal from the local oscillator to the RF input stage.
摘要翻译：公开了一种用于直接转换接收机的LO泄漏消除器。消除器包括用于提供至少两个输入信号的RF输入级，本地振荡器，同相处理器和正交处理器。本地振荡器被配置为产生用于调制两个输入信号的至少两个参考信号。同相和正交处理器中的每一个包括两个连续的正交分离器，其操作以基本上减少参考信号从本地振荡器到RF输入级的泄漏。

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