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1. 发明公开

EP4270784A1 RADIO FREQUENCY POWER AMPLIFIER THAT REDUCES LOAD CHANGE SENSITIVITY, CHIP, AND COMMUNICATION TERMINAL 审中-实审
公开(公告)号：EP4270784A1
公开(公告)日：2023-11-01
申请号：EP21909458.8
申请日：2021-12-22
申请人： Vanchip (Tianjin) Technology Co., Ltd.
发明人： LI, Haihui , BAI, Yunfang
IPC分类号： H03F3/189 , H04B1/04
摘要： Disclosed is a radio frequency power amplifier that reduces load change sensitivity, which comprises a feedback circuit (10) and a plurality of levels of amplification circuit, the feedback circuit (10) and all or a portion of amplification circuit among the plurality of levels of amplification circuit being connected in parallel between a first node (M) and a second node (N), and a feedback loop made up of the feedback circuit (10) and an amplification circuit main path located between the first node (M) and the second node (N) forming a 180° + 360° × n phase shift, where n is a natural number. The radio frequency power amplifier utilizes the feedback circuit (10) which assembled from a passive component, a suitable feedback point is selected, and the feedback loop is utilized to form a 180° + 360° × n phase shift on the basis of a feedback device in the feedback loop forming a 360° phase shift, and thereby output power of the radio frequency power amplifier is stabilized, and the sensitivity to load change of the radio frequency power amplifier is reduced.

2. 发明公开

EP4060896A1 RADIO FREQUENCY POWER AMPLIFIER, CHIP, AND COMMUNICATION TERMINAL 审中-公开
公开(公告)号：EP4060896A1
公开(公告)日：2022-09-21
申请号：EP20886218.5
申请日：2020-11-12
申请人： Vanchip (Tianjin) Technology Co. Ltd
发明人： ZHAO, Jinxin , BAI, Yunfang
IPC分类号： H03F3/195 , H03F3/24 , H03F3/213
摘要： A radio frequency power amplifier, a chip, and a communication terminal. The radio frequency power amplifier comprises a power amplifier circuit (5), an output matching circuit (2), a power detection circuit (3), and a bias comparison circuit (4). The output power on a main signal path is measured by the power detection circuit (3), and an equivalent voltage proportional to the output power is obtained and input to the bias comparison circuit (4); the equivalent voltage value is adjusted by means of the bias comparison circuit (4) and compared with a control voltage (1) to provide a bias voltage and/or collector voltage for the power amplifier circuit (5), thereby forming a closed-loop circuit, such that the radio frequency power amplifier can work in a stable state when gains and output power are in different power levels.

3. 发明公开

EP3896854A1 RADIO FREQUENCY SWITCH CIRCUIT, CHIP, AND COMMUNICATION TERMINAL 审中-实审
公开(公告)号：EP3896854A1
公开(公告)日：2021-10-20
申请号：EP20734308.8
申请日：2020-02-20
申请人： Vanchip (Tianjin) Technology Co. Ltd
发明人： LIN, Sheng
IPC分类号： H03K17/687 , H03K17/041
摘要： Disclosed are a radio frequency switch circuit, a chip, and a communication terminal. In the radio frequency switch circuit, a switch chain is formed by at least one switch unit being provided between a first port and a second port; each switch unit is connected to a first bias circuit and to a second bias circuit; further adjustments are made to the ratio of the parasitic capacitance between MOS transistors of each switch unit to a third capacitance; and adjustments are made to the size of said MOS transistors as well as to the ratio of said size to the third capacitance. In this way, voltage distribution uniformity on the switch chain may be improved, thus increasing the overall voltage withstand ability of the radio frequency switch circuit, and reducing the occurrence of harmonic events.

4. 发明公开

EP3386123A1 VARIABLE CODING METHOD FOR REALIZING CHIP REUSE AND COMMUNICATION TERMINAL THEREFOR 有权
公开(公告)号：EP3386123A1
公开(公告)日：2018-10-10
申请号：EP16869993.2
申请日：2016-11-30
申请人： Vanchip (Tianjin) Technology Co. Ltd
发明人： LIN, Sheng
IPC分类号： H04B14/00
CPC分类号： H03K19/0002 , H03K19/00307 , H03K19/08 , H03K19/212 , H04B14/00
摘要： Disclosed is a variable coding method for realizing chip reuse, comprising the following steps: using at least two identical integrated circuit chips, wherein each integrated circuit chip executes different control logic truth tables according to different gating signals; introducing at least one logical control signal as a gating signal; and controlling the logical control signal, so that each integrated circuit chip respectively executes a corresponding control logic truth table. Also disclosed is a communication terminal using the variable coding method for realizing chip reuse. Two or more completely identical integrated circuit chips can be used to realize different logical control functions, thereby simplifying the type of a chip for realizing a system function, and greatly reducing the development costs of an integrated circuit system and the management complexity of a mass production supply chain.

5. 发明公开

EP4293900A3 MULTIMODE POWER AMPLIFIER MODULE, CHIP AND COMMUNICATION TERMINAL 审中-实审
公开(公告)号：EP4293900A3
公开(公告)日：2024-03-27
申请号：EP23206865.0
申请日：2016-12-01
申请人： Vanchip (Tianjin) Technology Co. Ltd
发明人： Bai, Yunfang
IPC分类号： H03F1/42 , H03F1/02 , H03F3/195 , H03F3/213 , H03F3/24 , H03G1/00 , H03G3/30
摘要： A multimode power amplifier module, a chip and a communication terminal. In the multimode power amplifier module, a control circuit (104) sends a bias signal to a low-frequency power amplifier (102) or a high-frequency power amplifier (106) according to a baseband signal, so as to control the amplification of an accessed low-frequency radio frequency signal or a high-frequency radio frequency signal by the low-frequency power amplifier (102) or the high-frequency power amplifier (106); and a transceiving switch (108) selects a corresponding operation mode to conduct transmission or receiving according to an operation mode selection signal. A power amplification path is reused according to different modes, so that the power amplification path can be shared by different operation modes of a high and low frequency band with the adjustment of the control circuit (104), thus simplifying the complexity in designing the power amplifier module, and reducing the cost of relevant design implementation.

6. 发明公开

EP3816807A1 SERIAL COMMUNICATION APPARATUS AND SERIAL COMMUNICATION METHOD 审中-公开
公开(公告)号：EP3816807A1
公开(公告)日：2021-05-05
申请号：EP19826970.6
申请日：2019-06-28
申请人： Vanchip (Tianjin) Technology Co. Ltd
发明人： ZHANG, Qihua , BAI, Yunfang
IPC分类号： G06F13/38
摘要： Disclosed are a serial communication apparatus and a serial communication method. The serial communication apparatus comprises a radio frequency front-end module and a radio frequency device, a first input interface and a second input interface of the radio frequency front-end module being correspondingly connected to output interfaces of a main control module, a first output interface of the radio frequency front-end module being connected to a first input interface of the at least one radio frequency device via a first signal bus, a second output interface of the radio frequency front-end module being connected to a second input interface of the at least one radio frequency device via a second signal bus. The present invention satisfies requirements for convenient and rapid unidirectional communication between various chips of the radio frequency front-end module and inside the chips, reduces communication complexity, and increases transmission efficiency.

7. 发明公开

EP4383039A1 POWER SUPPLY SUPPRESSION CIRCUIT, CHIP AND COMMUNICATION TERMINAL 审中-实审
公开(公告)号：EP4383039A1
公开(公告)日：2024-06-12
申请号：EP22851937.7
申请日：2022-07-22
申请人： Vanchip (Tianjin) Technology Co. Ltd
发明人： LI, Chunling , WANG, Yongshou , CHEN, Cheng , LIN, Sheng
IPC分类号： G05F1/56
摘要： A power supply suppression circuit (10), a chip and a communication terminal that do not introduce additional DC power consumption, and only achieve the enhancement of the power supply suppression capability from an AC, without generating additional circuit power consumption. The power supply suppression circuit (10) comprises a sampling unit (105), a compensation unit (106), and an amplification unit (107). The sampling unit (105) is connected to the compensation unit (106), and the compensation unit (106) is connected to the amplification unit (107). The power supply suppression circuit (10) obtains an AC signal from a preset sampling node position of a low dropout regulator, and generates an enhancement signal in phase with the AC signal on a power supply (Vdd) on the basis of the AC signal, such that the input end voltage of the power output stage of the low dropout regulator immediately follows the voltage change of the power supply (Vdd) to suppress the power supply noise.

8. 发明公开

EP3817176A1 SURGE PROTECTION DEVICE AND CHIP CONSTITUTED BY SAME, AND COMMUNICATION TERMINAL 审中-公开
公开(公告)号：EP3817176A1
公开(公告)日：2021-05-05
申请号：EP19824669.6
申请日：2019-06-28
申请人： Vanchip (Tianjin) Technology Co. Ltd
发明人： LIN, Sheng
IPC分类号： H02H9/04
摘要： Disclosed are a surge protection device and a chip constituted thereby, and a communication terminal. The surge protection device comprises an input pad and an output pad. The input pad is connected to a power supply voltage, and the output pad is connected to a ground wire. NMOS transistor groups are provided between the input pad and the output pad. The NMOS transistor groups are connected to the input pad and the output pad respectively by means of metal wires. The structures of the metal wires between the NMOS transistor groups and the input pad and the output pad respectively and/or the structures of the NMOS transistor groups are changed to reduce or cancel non-uniform turn-on of the NMOS transistor groups caused by metal wires having different lengths from the NMOS transistor groups to the input pad and the output pad respectively along a power supply voltage wire direction, thereby improving the turn-on uniformity of the surge protection device and improving the surge preventing capability.

9. 发明公开

EP3651357A1 RADIO FREQUENCY POWER AMPLIFIER BASED ON POWER DETECTION FEEDBACK, CHIP, AND COMMUNICATION TERMINAL 审中-实审
公开(公告)号：EP3651357A1
公开(公告)日：2020-05-13
申请号：EP18828768.4
申请日：2018-06-30
申请人： Vanchip (Tianjin) Technology Co., Ltd.
发明人： ZHAO, Jinxin , BAI, Yunfang
IPC分类号： H03F3/24 , H03G3/30
摘要： Disclosed in the present invention are a radio frequency power amplifier based on power detection feedback, a chip, and a communication terminal. The radio frequency power amplifier comprises multiple stages of amplifier circuits and at least one power detection feedback circuit; the input end of the power detection feedback circuit is connected to the output end of a current stage of amplifier circuit, and the output end of the power detection feedback circuit is connected to the input ends of the current stage of amplifier circuit and at least one stage of amplifier circuit located prior to the current stage of amplifier circuit. The power detection feedback circuit generates, according to the detected output power of the current stage of amplifier circuit, a control voltage varying inversely with the output power, so that the power detection feedback circuit outputs current varying positively with the control voltage. The quiescent operating current of the current stage of amplifier circuit and at least one stage of amplifier circuit located prior to the current stage of amplifier circuit is controlled by means of the current, so that the radio frequency power amplifier operates in a state in which the gain and the output power are stable.

10. 发明公开

EP3651356A1 RADIO FREQUENCY POWER AMPLIFIER BASED ON CURRENT DETECTION FEEDBACK, CHIP, AND COMMUNICATION TERMINAL 审中-实审
公开(公告)号：EP3651356A1
公开(公告)日：2020-05-13
申请号：EP18828874.0
申请日：2018-06-30
申请人： Vanchip (Tianjin) Technology Co., Ltd.
发明人： ZHAO, Jinxin , BAI, Yunfang
IPC分类号： H03F3/193 , H03G3/12
摘要： Disclosed in the present invention are a radio frequency power amplifier based on current detection feedback, a chip, and a communication terminal. The radio frequency power amplifier comprises multiple stages of amplifier circuits and at least one current detection feedback circuit; the input end of the current detection feedback circuit is connected to the input end of a current stage of amplifier circuit among the multiple stages of amplifier circuits by means of a corresponding resistor, and the output end of the current detection feedback circuit is connected to the input end of at least one stage of amplifier circuit prior to the current stage of amplifier circuit. The current detection feedback circuit generates, according to the detected quiescent operating current of the current stage of amplifier circuit, a control voltage varying inversely with the quiescent operating current, so that the current detection feedback circuit outputs current varying positively with the control voltage. The current is input to the input end of the at least one stage of amplifier circuit prior to the current stage of amplifier circuit, and the quiescent operating current of the at least one stage of amplifier circuit prior to the current stage of amplifier circuit is controlled, so that the radio frequency power amplifier operates in a state in which the gain and the output power are stable.

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