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公开(公告)号：US10833636B2
公开(公告)日：2020-11-10
申请号：US16064470
申请日：2016-12-22
发明人： Yunfang Bai
IPC分类号： H03F1/30 , H03F1/32 , H03F3/24 , H03F1/34 , H03F1/56 , H03F1/08 , H03F3/19 , H03F3/195 , H03F3/213
摘要： A method for improving the linearity of a radio frequency power amplifier, a compensation circuit (307) for implementing the method, and a communications terminal with the compensation circuit (307). In the method, a compensation circuit (307) is connected between a base (a3) and a collector (b3) of a transistor of a common emitter amplifier (306), in order to neutralize the impact of a variation in capacitance between the base (a3) and the collector (b3) of the transistor (306) according to a radio frequency signal. No additional direct-current power consumption is needed, and degradation in performance of other radio frequency power amplifiers can be avoided. The corresponding compensation circuit (307) can be easily integrated with a main amplification circuit, without affecting other performance of the main amplification circuit, and provides high adjustability.
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公开(公告)号：US10230344B2
公开(公告)日：2019-03-12
申请号：US15551043
申请日：2016-01-12
发明人： Ji Chen
IPC分类号： H03F3/191 , H03G3/20 , H03F1/02 , H03F1/56 , H03F3/19 , H03F3/21 , H03F3/72 , H03G1/00 , H03G3/30
摘要： An adjustable gain power amplifier, a gain adjustment method and a mobile terminal are disclosed. The adjustable gain power amplifier comprises an input matching circuit, a gain adjustment circuit, a biasing circuit, a main amplification circuit, and an output matching circuit; the input matching circuit is connected between an input end and the gain adjustment circuit; the gain adjustment circuit is connected between the input matching circuit and the input end of the main amplification circuit; the output end of the main amplification circuit is connected to the output matching circuit, a positive power source end thereof is connected to a power supply source, a negative power source end thereof is connected to the biasing circuit; the biasing circuit provides different biasing voltages for the main amplification circuit; and the gain adjustment circuit and the biasing circuit are respectively connected to a gain adjustment control voltage (Vctrl).
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公开(公告)号：US20240142506A1
公开(公告)日：2024-05-02
申请号：US18401493
申请日：2023-12-31
发明人： Yongshou WANG , Chunling LI , Cheng CHEN , Chenyang GAO
IPC分类号： G01R29/08
CPC分类号： G01R29/0892
摘要： A power measurement circuit, a chip and a communication terminal. The power measurement circuit comprises a power measurement unit (100), a reference current generation unit (200), a voltage-current conversion unit (300) and an operation output unit (400), wherein an output end of the power measurement unit (100) is connected to an input end of the voltage-current conversion unit (300), and an output end of the voltage-current conversion unit (300) and an output end of the reference current generation unit (200) are respectively connected to an input end of the operation output unit (400). By means of the circuit, during the process of a power measurement unit (100) converting, into a direct-current voltage, a received radio frequency signal to be measured, sensitivity adjustment is performed, such that the measurement sensitivity can be effectively adjusted.
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公开(公告)号：US20230291309A1
公开(公告)日：2023-09-14
申请号：US18318026
申请日：2023-05-16
发明人： Yongshou WANG , Cheng CHEN , Chunling LI , Sheng LIN
IPC分类号： H02M3/07
CPC分类号： H02M3/07
摘要： A positive-and-negative-voltage charge pump circuit, comprising a clock generation module, a positive-voltage charge pump module, a transient enhancement module, and a negative-voltage charge pump module. The positive-voltage charge pump module generates a positive voltage according to a clock signal output by the clock generation module, and the transient enhancement module is used to sample the positive voltage and a power supply voltage, and convert same into currents for comparison, such that the negative-voltage charge pump module provides a switchable input voltage according to a comparison result. The negative-voltage charge pump module can quickly and reliably establish a negative voltage according to a clock signal output by the clock generation module, thereby improving the speed and efficiency of the negative-voltage charge pump module generating the negative voltage. Further disclosed are an integrated circuit chip, which comprises the positive-and-negative-voltage charge pump circuit, and a communication terminal.
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公开(公告)号：US10153733B2
公开(公告)日：2018-12-11
申请号：US15551042
申请日：2016-01-12
发明人： Xu Niu
摘要： An active bias circuit for a power amplifier and a mobile terminal are disclosed. The circuit includes a proportional to absolute temperature (PTAT) current source circuit, a reference voltage circuit, an isolation voltage stabilizing circuit, and a bias voltage circuit. An input end of the PTAT current source circuit is connected to a voltage source (Vbat), and an output end is connected to the reference voltage circuit. The reference voltage circuit generates a reference voltage that is in proportion to a current and a temperature. The isolation voltage stabilizing circuit isolates the reference voltage circuit from the bias voltage circuit, and supplies a stabilized voltage to the bias voltage circuit by using a negative feedback loop. The bias voltage circuit receives the voltage of the isolation voltage stabilizing circuit, and is also connected to the voltage source (Vbat).
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公开(公告)号：US11863134B2
公开(公告)日：2024-01-02
申请号：US17027708
申请日：2020-09-22
申请人： Gang Chen , Yunfang Bai
发明人： Gang Chen , Yunfang Bai
CPC分类号： H03F3/193 , H03F3/213 , H03F3/602 , H03F2200/18
摘要： Disclosed in the present invention are a balanced radio frequency power amplifier, a chip and a communication terminal. The radio frequency power amplifier divides, by means of a 90-degree power splitter unit, a radio frequency input signal into two equal-amplitude signals having a phase difference of 90 degrees, the two radio frequency input signals are amplified and then inputted into an adjustable 90 -degree power combiner, and the values of a adjustable capacitor and an adjustable resistor in the adjustable 90-degree power combiner are controlled by means of a control unit, so as to synthesize the two radio frequency input signals into one radio frequency input signal when the phase difference and amplitude difference of the two signals at different frequencies are the smallest, and to input the radio frequency input signal into a circuit of the next stage by means of a specific radio frequency transmission path.
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公开(公告)号：US20230291393A1
公开(公告)日：2023-09-14
申请号：US18318674
申请日：2023-05-16
发明人： Chenyang GAO , Yongshou WANG , Sheng LIN
CPC分类号： H03K3/0315 , H03L7/0995
摘要： Disclosed in the present invention are a low-temperature coefficient ring oscillator, a chip, and a communication terminal. The low-temperature coefficient ring oscillator comprises a temperature tracking compensation circuit, an inverter oscillation circuit, and a buffer shaping circuit. The temperature characteristics of the impedance of a PMOS tube and an NMOS tube in an inverter in the inverter oscillation circuit are tracked and compensated for by means of the impedance, along with temperature change, of a PMOS tube and a NMOS tube connected by a diode.
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公开(公告)号：US20230288500A1
公开(公告)日：2023-09-14
申请号：US18318040
申请日：2023-05-16
发明人： Yongshou WANG , Chenyang GAO , Sheng LIN
IPC分类号： G01R31/68 , G01R19/257 , G01R19/155
CPC分类号： G01R31/68 , G01R19/257 , G01R19/155
摘要： Disclosed in the present invention are a chip port state detection circuit, a chip, and a communication terminal. The chip port state detection circuit, by means of a port detection conversion circuit, converts the state of a port to be detected into a corresponding voltage and respectively outputs same to a first comparator and a second comparator, which, after comparing same with a corresponding input reference voltage, output a logic signal to a chip ID determination circuit to obtain a chip ID corresponding to the state of the chip port to be detected, in order to distinguish multiple identical chips.
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