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公开(公告)号：US20180138881A1
公开(公告)日：2018-05-17
申请号：US15853950
申请日：2017-12-25
发明人： Hua LONG , Liyang ZHANG , Zhenjuan CHENG , Dongjie TANG , Qian ZHAO
CPC分类号： H03G3/3042 , H03F1/0211 , H03F1/0261 , H03F1/565 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/45 , H03F2200/111 , H03F2200/18 , H03F2200/36 , H03F2200/387 , H03F2200/405 , H03F2200/411 , H03F2200/451 , H03F2200/462 , H03G1/0088
摘要： A power amplifier output power control circuit includes a first operational amplifier with a negative input terminal configured to receive a power control signal; a first PMOS transistor with a grid electrode connected to an output terminal of the first operational amplifier, a source electrode connected to an external power source, and a drain electrode grounded via a voltage dividing network; a power amplifier with a power end connected to the drain electrode of the first PMOS transistor, an input terminal configured to access to a signal to be amplified, and an output terminal configured to amplify the signal; and a current sampling circuit configured to produce sampling current after sampling current across the first PMOS transistor and providing a negative feedback signal for the positive input terminal of the first operational amplifier according to the sampling current such that total output power of the power amplifier keeps unchanged.
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公开(公告)号：US20180123539A1
公开(公告)日：2018-05-03
申请号：US15854738
申请日：2017-12-26
发明人： Hua LONG , Liyang ZHANG , Zhenjuan CHENG , Dongjie TANG , Qian ZHAO
CPC分类号： H03G3/3042 , H03F1/0211 , H03F1/0261 , H03F1/565 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/45 , H03F2200/111 , H03F2200/18 , H03F2200/36 , H03F2200/387 , H03F2200/405 , H03F2200/411 , H03F2200/451 , H03F2200/462 , H03G1/0088
摘要： A multi-mode multi-band power amplifier includes a controller, a wide-band amplifier channel and a fundamental impedance transformer. The controller receives an external signal and outputs a control signal according to the external signal. The wide-band amplifier channel receives single-band or multi-band RF signals through the input terminal, performs power amplification on the RF signals and outputs the RF signals through the output terminal. The fundamental impedance transformer includes a first segment shared by RF signals in all bands, second segments respectively special for RF signals in all bands, and a switching circuit controlled by the controller to separate RF signals subject to power amplification to the second segment in a switchable manner for multiplexed outputs.
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公开(公告)号：US20180138880A1
公开(公告)日：2018-05-17
申请号：US15853835
申请日：2017-12-24
发明人： Hua LONG , Liyang ZHANG , Zhenjuan CHENG , Dongjie TANG , Qian ZHAO
CPC分类号： H03G3/3042 , H03F1/0211 , H03F1/0261 , H03F1/565 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/45 , H03F2200/111 , H03F2200/18 , H03F2200/36 , H03F2200/387 , H03F2200/405 , H03F2200/411 , H03F2200/451 , H03F2200/462 , H03G1/0088
摘要： A power amplifier gain attenuation circuit includes: a gain attenuation (reduction) circuit configured to receive an input signal, an external drive signal and a bias voltage, and output a secondary input signal after attenuating the input signal depending on the drive signal and bias voltage; an amplifier including: a bias input terminal configured to receive a bias voltage; a signal input terminal configured to receive a secondary input signal, and an output terminal configured to output a gained output signal. The power amplifier gain attenuation circuit can reduce a gain effectively, and the amount of phase jump caused by the attenuation is quite small.
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公开(公告)号：US20160241213A1
公开(公告)日：2016-08-18
申请号：US15139087
申请日：2016-04-26
发明人： Qian ZHAO , Liyang ZHANG , Hua LONG , Zhenjuan CHENG , Dongjie TANG
CPC分类号： H03G3/3042 , H03F1/0211 , H03F1/0261 , H03F1/565 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/45 , H03F2200/111 , H03F2200/18 , H03F2200/36 , H03F2200/387 , H03F2200/405 , H03F2200/411 , H03F2200/451 , H03F2200/462 , H03G1/0088
摘要： A multi-mode multi-band power amplifier and its circuits are provided. The power amplifier comprises a controller, a wide-band amplifier channel, and a fundamental impedance transformer. The controller receives an external signal and outputs a control signal according to the external signal. The wide-band amplifier channel receives a single-band or a multi-band RF signals through the input terminal, performs power amplification on the RF signals and outputs the RF signals through the output terminal. The fundamental impedance transformer comprises a first segment shared by RF signals in all bands, second segments respectively specific to RF signals in all bands, and a switching circuit controlled by the controller to separate a RF signal which is subject to power amplification to the second segment in a switchable manner for multiplexed outputs. A power amplifier output power control circuit, a gain switching circuit, and a gain attenuation circuit are also provided.
摘要翻译： 提供了多模式多频带功率放大器及其电路。 功率放大器包括控制器，宽带放大器通道和基波阻抗变压器。 控制器接收外部信号，并根据外部信号输出控制信号。 宽带放大器通道通过输入端接收单频带或多频带RF信号，对RF信号进行功率放大，并通过输出端输出RF信号。 基本阻抗变压器包括由所有频带中的RF信号共享的第一段，分别专用于所有频带中的RF信号的第二段，以及由控制器控制的将受功率放大的RF信号分离到第二段的开关电路 以可切换的方式进行多路复用输出。 还提供功率放大器输出功率控制电路，增益切换电路和增益衰减电路。
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公开(公告)号：US20170141749A1
公开(公告)日：2017-05-18
申请号：US15418748
申请日：2017-01-29
发明人： Qian ZHAO , Liyang ZHANG , Hua LONG , Zhenjuan CHENG , Dongjie TANG
CPC分类号： H03G3/3042 , H03F1/0211 , H03F1/0261 , H03F1/565 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/45 , H03F2200/111 , H03F2200/18 , H03F2200/36 , H03F2200/387 , H03F2200/405 , H03F2200/411 , H03F2200/451 , H03F2200/462 , H03G1/0088
摘要： A power amplifier gain switching circuit includes: a gain controller configured to receive an external input signal, output a first input signal, receive an external drive signal, and output a control signal based on the drive signal; an amplifier including: a bias input terminal configured to receive an external bias voltage; a signal input terminal configured to receive the first input signal; a control terminal configured to receive the control signal; and an output terminal configured to output an output signal with a gain; wherein the amplifier is configured to switch a gain factor of the output signal based on the control signal.
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