Patents by Inventor Yuan-Shuo Chang
Yuan-Shuo Chang 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: 10623034Abstract: A receiver circuit of a transceiver is disclosed including: a calibration circuit arranged to operably perform an I/Q mismatch calibration operation according to an in-phase detection signal and a quadrature detection signal to generate one or more compensation parameters; a parameter storage circuit; an interference detection circuit arranged to operably generate an estimated signal-to-interference ratio according to the in-phase detection signal and the quadrature detection signal; a receiver control circuit arranged to operably determine whether to discard the one or more compensation parameters, wherein the receiver control circuit stores the one or more compensation parameters into the parameter storage circuit only if the estimated signal-to-interference ratio exceeds a predetermined threshold.Type: GrantFiled: August 8, 2019Date of Patent: April 14, 2020Assignee: REALTEK SEMICONDUCTOR CORP.Inventors: Yuan-Shuo Chang, Tzu-Ming Kao
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Patent number: 10587436Abstract: A signal transmitter device includes a transmitter and a detection circuit. The transmitter is configured to transmit an output signal based on a first baseband signal and a second baseband signal, in which the first baseband signal and the second baseband signal have a baseband frequency. The detection circuit is configured to perform twice signal modulations according to the output signal to detect a signal component, which has the baseband frequency, of the output signal, in order to control a compensation circuit to correct a channel mismatch of the transmitter.Type: GrantFiled: August 14, 2018Date of Patent: March 10, 2020Assignee: REALTEK SEMICONDUCTOR CORPORATIONInventor: Yuan-Shuo Chang
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Publication number: 20200059257Abstract: A receiver circuit of a transceiver is disclosed including: a calibration circuit arranged to operably perform an I/Q mismatch calibration operation according to an in-phase detection signal and a quadrature detection signal to generate one or more compensation parameters; a parameter storage circuit; an interference detection circuit arranged to operably generate an estimated signal-to-interference ratio according to the in-phase detection signal and the quadrature detection signal; a receiver control circuit arranged to operably determine whether to discard the one or more compensation parameters, wherein the receiver control circuit stores the one or more compensation parameters into the parameter storage circuit only if the estimated signal-to-interference ratio exceeds a predetermined threshold.Type: ApplicationFiled: August 8, 2019Publication date: February 20, 2020Applicant: Realtek Semiconductor Corp.Inventors: Yuan-Shuo CHANG, Tzu-Ming KAO
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Patent number: 10498466Abstract: A transmitter circuit includes: an in-phase signal processing circuit; a quadrature signal processing circuit; an analog signal processing circuit arranged to operably generate a corresponding analog signal according to the signals outputted from the in-phase signal processing circuit and the quadrature signal processing circuit; a transmitter control circuit arranged to operably control the in-phase signal processing circuit and the quadrature signal processing circuit to cooperate with the analog signal processing circuit to generate a first predetermined signal at a first time point, and to operably control the in-phase signal processing circuit and the quadrature signal processing circuit to cooperate with the analog signal processing circuit to generate a second predetermined signal at a second time point, and an image rejection ratio measurement circuit arranged to operably generate an estimated image rejection ratio of the transmitter circuit.Type: GrantFiled: August 8, 2019Date of Patent: December 3, 2019Assignee: REALTEK SEMICONDUCTOR CORPORATIONInventors: Yuan-Shuo Chang, Tzu-Ming Kao
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Patent number: 10374643Abstract: A transmitter with compensating mechanism of pulling effect includes an output unit and a correction unit. The output unit mixes a first correction signal and a second correction signal according to an oscillating signal to generate a modulated signal, and to amplify the modulated signal to generate a first output signal. The correction unit analyzes the power of the first output signal to generate a first coefficient and a second coefficient, and generate the first correction signal and the second correction signal according to the first coefficient, the second coefficient, an in-phase data signal, and a quadrature data signal.Type: GrantFiled: December 26, 2016Date of Patent: August 6, 2019Assignee: REALTEK SEMICONDUCTOR CORPORATIONInventors: Wen-Shan Wang, Yuan-Shuo Chang, Chih-Chieh Wang
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Publication number: 20190173694Abstract: A signal transmitter device includes a transmitter and a detection circuit. The transmitter is configured to transmit an output signal based on a first baseband signal and a second baseband signal, in which the first baseband signal and the second baseband signal have a baseband frequency. The detection circuit is configured to perform twice signal modulations according to the output signal to detect a signal component, which has the baseband frequency, of the output signal, in order to control a compensation circuit to correct a channel mismatch of the transmitter.Type: ApplicationFiled: August 14, 2018Publication date: June 6, 2019Inventor: Yuan-Shuo Chang
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Patent number: 10305523Abstract: A transmitting device, for handling signal interference, comprises a first transmitting circuit, for processing a first plurality of baseband signals, to generate a first plurality of radio frequency signals; a second transmitting circuit, for processing a second plurality of baseband signals and a plurality of input signals, to generate a second plurality of radio frequency signals; a feedback circuit, coupled to the second transmitting circuit, for processing the second plurality of radio frequency signals and a plurality of leakage signals, to generate a plurality of error signals; and a control circuit, coupled to the first transmitting circuit, the second transmitting circuit and the feedback circuit, for generating the plurality of input signals according to the first plurality of baseband signals and the plurality of error signals.Type: GrantFiled: September 3, 2018Date of Patent: May 28, 2019Assignee: Realtek Semiconductor Corp.Inventors: Chin-Liang Wang, Min-Chau Jan, Wen-Shan Wang, Yuan-Shuo Chang, Wu-Chi Wang, Ying-Hsi Lin
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Patent number: 10230478Abstract: The invention relates to a system for interference cancellation and method thereof. The system includes a receiver, a transmitter, and a channel estimating and equalizing device. The transmitter and the receiver use different wireless communication technologies to transmit and receive data. The channel estimating and equalizing device can estimate the channel between the transmitter and the receiver for interference cancellation. The embodiments of the invention provide a system and a method thereof for reducing interferences generated when using one wireless communication technology to transmit signals but using another wireless communication technology to receive signals by using digital baseband signals.Type: GrantFiled: March 22, 2017Date of Patent: March 12, 2019Assignee: REALTEK SEMICONDUCTOR CORP.Inventors: Wu-Chi Wang, Yuan-Shuo Chang
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Publication number: 20190074855Abstract: A transmitting device, for handling signal interference, comprises a first transmitting circuit, for processing a first plurality of baseband signals, to generate a first plurality of radio frequency signals; a second transmitting circuit, for processing a second plurality of baseband signals and a plurality of input signals, to generate a second plurality of radio frequency signals; a feedback circuit, coupled to the second transmitting circuit, for processing the second plurality of radio frequency signals and a plurality of leakage signals, to generate a plurality of error signals; and a control circuit, coupled to the first transmitting circuit, the second transmitting circuit and the feedback circuit, for generating the plurality of input signals according to the first plurality of baseband signals and the plurality of error signals.Type: ApplicationFiled: September 3, 2018Publication date: March 7, 2019Inventors: Chin-Liang Wang, Min-Chau Jan, Wen-Shan Wang, Yuan-Shuo Chang, Wu-Chi Wang, Ying-Hsi Lin
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Patent number: 10211931Abstract: A method of interference cancellation includes the following steps: performing a take-energy operation on a to-be-sent signal at multiple times to generate multiple to-be-sent signal powers; performing a first high-pass operation on the to-be-sent signal powers to generate a to-be-sent high-pass result; performing a second high-pass operation on a received signal to generate a received high-pass result; adjusting multiple filter coefficients according to the to-be-sent high-pass result and the received high-pass result; and generating a recover signal according to the filter coefficients.Type: GrantFiled: July 18, 2018Date of Patent: February 19, 2019Assignee: Realtek Semiconductor Corp.Inventors: Chin-Liang Wang, Kuan-Kai Chen, Min-Chau Jan, Wen-Shan Wang, Yuan-Shuo Chang, Ying-Hsi Lin
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Patent number: 10027357Abstract: A transmitter with compensating mechanism of pulling effect includes a correction unit and an output unit. The correction unit includes a memory circuit and a first address generation circuit. The memory circuit is configured to store a look up table, wherein the look up table stores correction data corresponding to an in-phase data signal, a quadrature data signal, and at least one system parameter. The first address generation circuit is configured to generate a first address according to the in-phase data signal, the quadrature data signal, and the at least one system parameter, in order to output a correction signal via the correction data. The output unit is configured to modulate the correction signal according to an oscillating signal to generate a modulated signal, and amplify the modulated signal to generate an output signal.Type: GrantFiled: December 28, 2016Date of Patent: July 17, 2018Assignee: REALTEK SEMICONDUCTOR CORPORATIONInventor: Yuan-Shuo Chang
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Patent number: 9900019Abstract: A calibration circuit for a time-interleaved analog-to-digital converter includes a filter circuit and a calculating circuit. The filter circuit is configured to receive a first signal and generate a second signal based on the first signal. The first signal comprises an image of an interference signal, the second signal comprises a reconstructed image of the interference signal, and a frequency of the reconstructed image of the interference signal is the same as a frequency of the image of the interference signal. The calculating circuit is configured to cancel the image of the interference signal of the first signal according to the second signal.Type: GrantFiled: September 28, 2017Date of Patent: February 20, 2018Assignee: REALTEK SEMICONDUCTOR CORPORATIONInventor: Yuan-Shuo Chang
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Publication number: 20170373764Abstract: The invention relates to a system for interference cancellation and method thereof. The system includes a receiver, a transmitter, and a channel estimating and equalizing device. The transmitter and the receiver use different wireless communication technologies to transmit and receive data. The channel estimating and equalizing device can estimate the channel between the transmitter and the receiver for interference cancellation. The embodiments of the invention provide a system and a method thereof for reducing interferences generated when using one wireless communication technology to transmit signals but using another wireless communication technology to receive signals by using digital baseband signals.Type: ApplicationFiled: March 22, 2017Publication date: December 28, 2017Inventors: WU-CHI WANG, YUAN-SHUO CHANG
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Patent number: 9749172Abstract: A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a receiver is proposed in the present invention, including: utilizing the receiver to receive at least one test signal with a specific frequency via the first signal path and the second signal path, to generate a first signal path received signal and a second signal path received signal; performing frequency analysis upon the first signal path received signal and the second signal path received signal respectively, to generate a first frequency analysis result and a second frequency analysis result; and calculating at least one calibration coefficient according to the first frequency analysis result and the second frequency analysis result. A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter is also proposed in the present invention.Type: GrantFiled: May 28, 2015Date of Patent: August 29, 2017Assignee: Realtek Semiconductor Corp.Inventors: Yuan-Shuo Chang, Ching-Chia Cheng
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Publication number: 20170194990Abstract: A transmitter with compensating mechanism of pulling effect includes an output unit and a correction unit. The output unit mixes a first correction signal and a second correction signal according to an oscillating signal to generate a modulated signal, and to amplify the modulated signal to generate a first output signal. The correction unit analyzes the power of the first output signal to generate a first coefficient and a second coefficient, and generate the first correction signal and the second correction signal according to the first coefficient, the second coefficient, an in-phase data signal, and a quadrature data signal.Type: ApplicationFiled: December 26, 2016Publication date: July 6, 2017Inventors: Wen-Shan WANG, Yuan-Shuo CHANG, Chih-Chieh WANG
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Publication number: 20170194991Abstract: A transmitter with compensating mechanism of pulling effect includes a correction unit and an output unit. The correction unit includes a memory circuit and a first address generation circuit. The memory circuit is configured to store a look up table, wherein the look up table stores correction data corresponding to an in-phase data signal, a quadrature data signal, and at least one system parameter. The first address generation circuit is configured to generate a first address according to the in-phase data signal, the quadrature data signal, and the at least one system parameter, in order to output a correction signal via the correction data. The output unit is configured to modulate the correction signal according to an oscillating signal to generate a modulated signal, and amplify the modulated signal to generate an output signal.Type: ApplicationFiled: December 28, 2016Publication date: July 6, 2017Inventor: Yuan-Shuo CHANG
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Patent number: 9450544Abstract: A pre-distortion method includes: receiving an input data; and obtaining a pre-distortion output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier; and multiplying a reciprocal of a pre-distortion ratio of the output of the power amplifier to the input data by the output of the power amplifier. A pre-distortion apparatus includes a receiver, a pre-distortion unit and a gain compensating unit. The receiver is utilized for receiving an input data. The pre-distortion unit is utilized for obtaining a pre-distortion output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier. The gain compensating unit is utilized for multiplying a reciprocal of a pre-distortion ratio of the output of the power amplifier to the input data by the output of the power amplifier.Type: GrantFiled: August 12, 2014Date of Patent: September 20, 2016Assignee: Realtek Semiconductor Corp.Inventor: Yuan-Shuo Chang
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Patent number: 9438177Abstract: A pre-distortion method includes: receiving an input data; and obtaining a pre-distorted output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a power amplifier. A pre-distortion apparatus includes a receiver and a pre-distortion unit. The receiver is utilized for receiving an input data. The pre-distortion unit is utilized for obtaining a pre-distorted output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier. A non-transitory machine readable medium stores a program code executed for performing steps of the proposed pre-distortion method.Type: GrantFiled: June 30, 2014Date of Patent: September 6, 2016Assignee: Realtek Semiconductor Corp.Inventor: Yuan-Shuo Chang
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Patent number: 9331652Abstract: An auto gain adjusting device and method is disclosed. The auto gain adjusting device comprises a predistorter, a gain unit, a power amplifier, a receiving unit and a calculation unit. The predistorter generates a plurality of test signals in a calibration mode, wherein the powers between a current test signal and a previous test signal includes a first difference value. The gain unit provides a substantially constant gain value to the current test signal and the previous test signal to generate a current amplified test signal and a previous amplified test signal. The power amplifier amplifies the current amplified test signal and the previous amplified test signal to generate a first transmitting signal and a second transmitting signal. The receiving unit converts the first transmitting signal and the second transmitting signal into a first baseband signal and a second baseband signal respectively.Type: GrantFiled: April 8, 2014Date of Patent: May 3, 2016Assignee: REALTEK SEMICONDUCTOR CORP.Inventor: Yuan-Shuo Chang
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Patent number: 9215014Abstract: A method for determining a default gain of a wireless transmission system is provided. The wireless transmission system includes a signal transmission path and a signal feedback path coupled to the signal transmission path. The signal transmission path includes a power amplification circuit and a gain stage having a plurality of transmission gains. The method includes the following step: setting a gain of the gain stage as a specific transmission gain of the transmission gains; transmitting a plurality of test signals through the signal transmission path in sequence to generate a plurality of amplified test signals, wherein at least a portion of powers of the test signals correspond to the transmission gains, respectively; receiving the amplified test signals through the signal feedback path in sequence, and accordingly obtaining corresponding signal gains; and determining a default gain of the gain stage according to the signal gains.Type: GrantFiled: April 15, 2014Date of Patent: December 15, 2015Assignee: Realtek Semiconductor Corp.Inventors: Yuan-Shuo Chang, Chien-Yu Chen