Patents by Inventor Jiangtao Yi
Jiangtao Yi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10778227Abstract: A level shifting circuit includes a shift circuit configured to output first and second voltage signals according to level signals, and an input circuit configured to carry out inversion and delay operations on input level signals to obtain first, second, third, and fourth level signals. Rising edge of the first level signal is earlier than falling edge of the second level signal by a first preset time. Falling edge of first level signal is later than rising edge of the second level signal by a second preset time; the third level signal is obtain by delaying the first level signal by a third preset time, and the fourth level signal is obtain by delaying the second level signal by a fourth preset time; the first preset time is longer than the third preset time, and the second preset time is longer than the fourth preset time.Type: GrantFiled: September 20, 2019Date of Patent: September 15, 2020Assignee: SMARTER MICROELECTRONICS (SHANGHAI) CO., LTD.Inventors: Jun Ma, Xin Wang, Jiangtao Yi
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Patent number: 10763796Abstract: A Miller compensation circuit includes: a differential amplifier having an inverse input end configured to receive an input signal; an output transistor having an output end connected to a positive input end of the differential amplifier, a first end connected to a first power supply, a second end connected to an output end of the differential amplifier, and a third end being a voltage output end and connected to the positive input end and a load; a Miller capacitor connected to the output end of the differential amplifier; a follower; and a current sampling circuit configured to sample a first current of the output transistor. The load is also connected to a second power supply.Type: GrantFiled: May 12, 2019Date of Patent: September 1, 2020Assignee: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: Qiang Su, Jiangtao Yi
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Publication number: 20200083807Abstract: A control circuit can be applied to a bias circuit including a first transistor and a second transistor with their gates connected. The first and second transistors are configured to amplify an input reference direct current (DC) current of the bias circuit to obtain a bias DC current. The control circuit includes: a detection circuit configured to compare a first DC voltage with a second DC voltage to obtain a comparison result; the first DC voltage being a drain DC voltage of the first transistor; and the second DC voltage being a drain DC voltage of the second transistor; and an adjustment circuit configured to adjust the first DC voltage and the second DC voltage by using the comparison result, such that the drain DC voltage of the first transistor equals the drain DC voltage of the second transistor when the bias circuit is in operation.Type: ApplicationFiled: November 15, 2019Publication date: March 12, 2020Applicant: SMARTER MICROELECTRONICS (SHANGHAI) CO., LTD.Inventors: Jun MA, Qiang SU, Jiangtao YI, Yang LI
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Publication number: 20200083580Abstract: A radio frequency amplification processing circuit includes: a radio frequency power amplifier, a transmitting antenna and a filter element; the radio frequency power amplifier is configured to perform radio frequency amplification on a modulated first wireless communication signal, and transmit, with a first line, the amplified first wireless communication signal to the transmitting antenna for transmission, or perform radio frequency amplification on a modulated second wireless communication signal, and transmit, with a second line, the amplified second wireless communication signal to the filter element; and the filter element is configured to filter the amplified second wireless communication signal, and transmit, also with the second line, the filtered second wireless communication signal to the transmitting antenna for transmission.Type: ApplicationFiled: November 14, 2019Publication date: March 12, 2020Applicant: SMARTER MICROELECTRONICS (SHANGHAI) CO., LTD.Inventors: Xue YANG, Baiming XU, Qiang SU, Jiangtao YI, Yang LI
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Publication number: 20200067463Abstract: A temperature compensation circuit for a radio frequency power amplifier includes: a temperature control circuit and a negative feedback circuit; the temperature control circuit is configured to generate a first electrical signal corresponding to a temperature, and according to the first electrical signal, adjust a second electrical signal at a first node; the negative feedback circuit is configured to provide, on the basis of the second electrical signal, a negative feedback signal to the radio frequency power amplifier by means of a second node; the second electrical signal is used to change the resistance value of the negative feedback circuit so as to adjust a negative feedback signal that is associated with the resistance value; the negative feedback signal is used to be inputted into the radio frequency power amplifier such that the gain of the radio frequency power amplifier changes.Type: ApplicationFiled: October 28, 2019Publication date: February 27, 2020Applicant: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: Qiang SU, Baiming XU, Jiangtao YI
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Publication number: 20200067540Abstract: A radio-frequency power amplification circuit includes: a power amplification sub-circuit and an output matching sub-circuit, wherein the power amplification sub-circuit is used for selecting, according to a received control signal corresponding to a radio-frequency mode, a power amplification parameter corresponding to the radio-frequency mode to amplify a received radio-frequency signal, and outputting the amplified radio-frequency signal; the output matching sub-circuit is connected to the power amplification sub-circuit and is used for receiving the amplified radio-frequency signal, and transmitting, according to the control signal, the amplified radio-frequency signal by using an impedance corresponding to the radio-frequency mode.Type: ApplicationFiled: October 29, 2019Publication date: February 27, 2020Applicant: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: Baiming XU, Qiang SU, Yang LI, Jiangtao YI
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Publication number: 20200067542Abstract: A radio frequency front end module includes an amplifier, a switch and a filter. The switch couples the amplifier with an antenna and connecting the amplifier with the filter, thereby forming a first signal channel in the radio frequency front end module, when a radio frequency signal needs to be transmitted and the transmitted radio frequency signal from a baseband chip needs to be filtered by the radio frequency front end module. The first signal channel can amplify and filter the radio frequency signal transmitted in the first signal channel. The switch can also couples the amplifier with the antenna, thereby forming a second signal channel in the radio frequency front end module, when the transmitted radio frequency signal does not need to be filtered by the radio frequency front end module. The second signal channel can amplify the radio frequency signal transmitted in the second signal channel.Type: ApplicationFiled: November 5, 2019Publication date: February 27, 2020Applicant: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: Baiming XU, Qiang SU, Jiangtao YI, Ping LI
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Publication number: 20200036336Abstract: A power control circuit includes: a voltage-current converter and a programmable current amplifier; the voltage-current converter is configured to detect an inputted output power control signal, and to convert the output power control signal to a control current and output same; and the programmable current amplifier is configured to receive the control current and output the amplified control current as a bias current of the power amplifier connected to the power control circuit.Type: ApplicationFiled: October 1, 2019Publication date: January 30, 2020Applicant: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: Qiang SU, Zhenfei PENG, Baiming XU, Jiangtao YI
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Publication number: 20200014386Abstract: A level shifting circuit includes a shift circuit configured to output first and second voltage signals according to level signals, and an input circuit configured to carry out inversion and delay operations on input level signals to obtain first, second, third, and fourth level signals. Rising edge of the first level signal is earlier than falling edge of the second level signal by a first preset time. Falling edge of first level signal is later than rising edge of the second level signal by a second preset time; the third level signal is obtain by delaying the first level signal by a third preset time, and the fourth level signal is obtain by delaying the second level signal by a fourth preset time; the first preset time is longer than the third preset time, and the second preset time is longer than the fourth preset time.Type: ApplicationFiled: September 20, 2019Publication date: January 9, 2020Applicant: SMARTER MICROELECTRONICS (SHANGHAI) CO., LTD.Inventors: Jun MA, Xin WANG, Jiangtao YI
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Patent number: 10489632Abstract: An electronic device and a detection method facilitate reducing power consumption of the electronic device. The electronic device includes: a touch panel having a fingerprint sensing region, a fingerprint module, a main processor and a coprocessor; where the coprocessor is configured to detect a touch event on the touch panel; the fingerprint module is configured to collect touch data of the fingerprint sensing region that corresponds to the detected touch event; and the coprocessor is further configured to acquire the touch data collected by the fingerprint module, and determine whether the touch event is a false touch according to the touch data.Type: GrantFiled: September 26, 2017Date of Patent: November 26, 2019Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventors: Yong Zuo, Jiangtao Yi
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Publication number: 20190267952Abstract: A Miller compensation circuit includes: a differential amplifier having an inverse input end configured to receive an input signal; an output transistor having an output end connected to a positive input end of the differential amplifier, a first end connected to a first power supply, a second end connected to an output end of the differential amplifier, and a third end being a voltage output end and connected to the positive input end and a load; a Miller capacitor connected to the output end of the differential amplifier; a follower; and a current sampling circuit configured to sample a first current of the output transistor. The load is also connected to a second power supply.Type: ApplicationFiled: May 12, 2019Publication date: August 29, 2019Applicant: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: Qiang SU, Jiangtao YI
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Publication number: 20190267948Abstract: A power control circuit includes a voltage control circuit and a current control circuit. The voltage control circuit is configured to detect an output power control signal that is inputted, convert the output power control signal into a control voltage and output the control voltage to the driver stage of a power amplifier connected to the power control circuit. The current control circuit is configured to detect an output power control signal that is inputted, convert the output power control signal into a control current and output the control current to the amplification stage of the power amplifier.Type: ApplicationFiled: May 13, 2019Publication date: August 29, 2019Applicant: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: Qiang SU, Baiming XU, Jiangtao YI, Yang LI
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Publication number: 20180300529Abstract: An electronic device and a detection method facilitate reducing power consumption of the electronic device. The electronic device includes: a touch panel having a fingerprint sensing region, a fingerprint module, a main processor and a coprocessor; where the coprocessor is configured to detect a touch event on the touch panel; the fingerprint module is configured to collect touch data of the fingerprint sensing region that corresponds to the detected touch event; and the coprocessor is further configured to acquire the touch data collected by the fingerprint module, and determine whether the touch event is a false touch according to the touch data.Type: ApplicationFiled: September 26, 2017Publication date: October 18, 2018Inventors: Yong ZUO, Jiangtao YI
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Patent number: 9660529Abstract: A transistor circuit of low shutoff-state current includes: a first transistor, a transistor string, and a switch. The first transistor and the transistor string are connected in series. The switch is configured to shut off the circuit. The first transistor is configured to reduce the shutoff-state current flowing therethrough using the negative feedback effect of the transistor string when the circuit is in a shutoff state; and the transistor string is configured to reduce the shutoff-state current flowing therethrough using a negative gate-source electrode voltage difference thereof and the bulk effect of the transistor.Type: GrantFiled: June 10, 2015Date of Patent: May 23, 2017Assignee: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: Qiang Su, Jiangtao Yi
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Publication number: 20150280570Abstract: A transistor circuit of low shutoff-state current includes: a first transistor, a transistor string, and a switch. The first transistor and the transistor string are connected in series. The switch is configured to shut off the circuit. The first transistor is configured to reduce the shutoff-state current flowing therethrough using the negative feedback effect of the transistor string when the circuit is in a shutoff state; and the transistor string is configured to reduce the shutoff-state current flowing therethrough using a negative gate-source electrode voltage difference thereof and the bulk effect of the transistor.Type: ApplicationFiled: June 10, 2015Publication date: October 1, 2015Applicant: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.Inventors: QIANG SU, JIANGTAO YI
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Patent number: 7925005Abstract: A method of calibrating longitudinal balance for a subscriber line interface circuit includes providing a first and a second driver of a differential driver pair for driving a subscriber line. An output of each of the first and second drivers is coupled to a common output. The common output is coupled to an input of the first driver. The gain of at least one of the first and second drivers is adjusted until a calibration signal (V1) present at the input of the first driver is substantially the same as a calibration signal (V2) present at the input of the second driver.Type: GrantFiled: October 23, 2006Date of Patent: April 12, 2011Assignee: Silicon Laboratories, Inc.Inventors: Michael J. Mills, Marius Goldenberg, Alan F. Hendrickson, Ion C. Tesu, Jiangtao Yi
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Publication number: 20080111584Abstract: A method of calibrating longitudinal balance for a subscriber line interface circuit includes providing a first and a second driver of a differential driver pair for driving a subscriber line. An output of each of the first and second drivers is coupled to a common output. The common output is coupled to an input of the first driver. The gain of at least one of the first and second drivers is adjusted until a calibration signal (V1) present at the input of the first driver is substantially the same as a calibration signal (V2) present at the input of the second driver.Type: ApplicationFiled: October 23, 2006Publication date: May 15, 2008Inventors: Michael J. Mills, Marius Goldenberg, Alan F. Hendrickson, Ion C. Tesu, Jiangtao Yi