Patents by Inventor Sheng-Hong Yan
Sheng-Hong Yan 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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Publication number: 20230188095Abstract: A package or a chip including a linear amplifier and a power amplifier is provided, wherein the linear amplifier is configured to receive an envelope tracking signal to generate an amplified envelope tracking signal, the power amplifier is supplied by an envelope tracking supply voltage comprising a DC supply voltage and the amplified envelope tracking signal, and the power amplifier is configured to receive an input signal to generate an output signal.Type: ApplicationFiled: January 12, 2023Publication date: June 15, 2023Applicant: MediaTek Inc.Inventors: Chen-Yen Ho, Chien-Wei Kuan, Sheng-Hong Yan, Hsin-Hung Chen
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Patent number: 11581854Abstract: A package or a chip including a linear amplifier and a power amplifier is provided, wherein the linear amplifier is configured to receive an envelope tracking signal to generate an amplified envelope tracking signal, the power amplifier is supplied by an envelope tracking supply voltage comprising a DC supply voltage and the amplified envelope tracking signal, and the power amplifier is configured to receive an input signal to generate an output signal.Type: GrantFiled: April 9, 2019Date of Patent: February 14, 2023Assignee: MediaTek Inc.Inventors: Chen-Yen Ho, Chien-Wei Kuan, Sheng-Hong Yan, Hsin-Hung Chen
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Publication number: 20230006611Abstract: A compensator compensates for the distortions of a power amplifier circuit. A power amplifier neural network (PAN) is trained to model the power amplifier circuit using pre-determined input and output signal pairs that characterize the power amplifier circuit. Then a compensator is trained to pre-distort a signal received by the PAN. The compensator uses a neural network trained to optimize a loss between a compensator input and a PAN output, and the loss is calculated according to a multi-objective loss function that includes one or more time-domain loss function and one or more frequency-domain loss functions. The trained compensator performs signal compensation to thereby output a pre-distorted signal to the power amplifier circuit.Type: ApplicationFiled: July 4, 2022Publication date: January 5, 2023Inventors: Po-Yu Chen, Hao Chen, Yi-Min Tsai, Hao Yun Chen, Hsien-Kai Kuo, Hantao Huang, Hsin-Hung Chen, Yu Hsien Chang, Yu-Ming Lai, Lin Sen Wang, Chi-Tsan Chen, Sheng-Hong Yan
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Patent number: 10483925Abstract: A circuit module includes a power amplifier, a switch, and a bypass capacitor. The power amplifier has a signal input node coupled to an input signal, a signal output node to generate an output signal, and a power input node coupled to a supply output signal of a supply modulator. The switch is coupled between the power input node of the power amplifier and the bypass capacitor. The bypass capacitor is an equivalently removable bypass capacitor coupled between the switch and a ground level.Type: GrantFiled: August 3, 2018Date of Patent: November 19, 2019Assignee: MEDIATEK INC.Inventors: Sheng-Hong Yan, Da-Wei Sung, Chen-Yen Ho, Chia-Sheng Peng, Chien-Wei Kuan
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Publication number: 20190334479Abstract: A package or a chip including a linear amplifier and a power amplifier is provided, wherein the linear amplifier is configured to receive an envelope tracking signal to generate an amplified envelope tracking signal, the power amplifier is supplied by an envelope tracking supply voltage comprising a DC supply voltage and the amplified envelope tracking signal, and the power amplifier is configured to receive an input signal to generate an output signal.Type: ApplicationFiled: April 9, 2019Publication date: October 31, 2019Inventors: Chen-Yen Ho, Chien-Wei Kuan, Sheng-Hong Yan, Hsin-Hung Chen
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Publication number: 20190052238Abstract: A circuit module includes a power amplifier, a switch, and a bypass capacitor. The power amplifier has a signal input node coupled to an input signal, a signal output node to generate an output signal, and a power input node coupled to a supply output signal of a supply modulator. The switch is coupled between the power input node of the power amplifier and the bypass capacitor. The bypass capacitor is an equivalently removable bypass capacitor coupled between the switch and a ground level.Type: ApplicationFiled: August 3, 2018Publication date: February 14, 2019Inventors: Sheng-Hong Yan, Da-Wei Sung, Chen-Yen Ho, Chia-Sheng Peng, Chien-Wei Kuan
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Patent number: 9998241Abstract: Apparatus and methods are provided to calibrate a closed-loop envelop tracking system for a power amplifier of a wireless transmitter using standardized modulation signals. In one novel aspect, a closed-loop adaptive method is used to track changes in PA nonlinearity due to environmental or circuitry changes during operating condition using standardized modulation signals. In one embodiment, the PA supply voltage compensation lookup table (LUT) and/or the phase compensation LUT is updated during normal operation to sustain good linearity and efficiency performance. In another novel aspect, the PA target response is adjusted in response to changes in PA-related system configuration, such as changes in PA bias settings, and/or indicators measured from the transmitter such as changes in impedance or temperature changes for the RF module or the PA module. The PA supply voltage compensation LUT and/or the phase LUT is updated accordingly upon adjustment of the PA target response.Type: GrantFiled: February 19, 2015Date of Patent: June 12, 2018Assignee: MEDIATEK INC.Inventors: Chiou-Wei Tsai, Chia-Sheng Peng, Sheng-Hong Yan
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Patent number: 9912306Abstract: Provided is a power supply circuit for a wireless mobile device having a plurality of power amplification components. The power supply circuit includes: a first DC-DC converter, for providing at least one constant output voltage (which is provided to the power amplification components) and/or at least one DC intermediate voltage; a second DC-DC converter, for providing a DC component of at least one time-varying output voltage; and at least one linear amplifier. When the at least one linear amplifier receives the at least one DC intermediate voltage from the first DC-DC converter, the at least one linear amplifier provides at least one AC component of the at least one time-varying output voltage. The DC component and the at least one AC component of the at least one time-varying output voltage are combined into the at least one time-varying output voltage and provided to the power amplification components.Type: GrantFiled: April 20, 2017Date of Patent: March 6, 2018Assignee: MEDIATEK INC.Inventors: Shih-Mei Lin, Chien-Wei Kuan, Chen-Yen Ho, Che-Hao Meng, Tso-Min Chen, Chia-Sheng Peng, Sheng-Hong Yan
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Publication number: 20180048272Abstract: Provided is a power supply circuit for a wireless mobile device having a plurality of power amplification components. The power supply circuit includes: a first DC-DC converter, for providing at least one constant output voltage (which is provided to the power amplification components) and/or at least one DC intermediate voltage; a second DC-DC converter, for providing a DC component of at least one time-varying output voltage; and at least one linear amplifier. When the at least one linear amplifier receives the at least one DC intermediate voltage from the first DC-DC converter, the at least one linear amplifier provides at least one AC component of the at least one time-varying output voltage. The DC component and the at least one AC component of the at least one time-varying output voltage are combined into the at least one time-varying output voltage and provided to the power amplification components.Type: ApplicationFiled: April 20, 2017Publication date: February 15, 2018Inventors: Shih-Mei Lin, Chien-Wei Kuan, Chen-Yen Ho, Che-Hao Meng, Tso-Min Chen, Chia-Sheng Peng, Sheng-Hong Yan
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Patent number: 9876517Abstract: A radio frequency (RF) receiver includes a digital tuning engine; and I-path and Q-path analog filters, tuned by the digital tuning engine. The digital tuning engine gets an I/Q imbalance difference, and the digital tuning engines tunes the I-path analog filter and/or the Q-path analog filter based on the I/O imbalance difference.Type: GrantFiled: June 30, 2015Date of Patent: January 23, 2018Assignee: MEDIATEK INC.Inventors: Sheng-Hong Yan, Sheng-Hao Chen, Paul Cheng Po Liang, Jen-Che Tsai
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Patent number: 9800274Abstract: A communication unit comprises a decimator configured to sample a variable control signal and output a reduced bandwidth variable control signal; and a multi-level power supply, MLPS, comprising an input and an output, wherein the input is coupled to the decimator and configured to receive the reduced bandwidth variable control signal and, in response thereto, the output delivers multi-level output voltages to supply a power amplifier, PA, module.Type: GrantFiled: June 8, 2016Date of Patent: October 24, 2017Assignee: MediaTek, Inc.Inventors: Sheng-Hong Yan, Chia-Sheng Peng, Paul Cheng Po Liang
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Patent number: 9680434Abstract: A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (RF) transmitter of a wireless communication unit is described. The method comprising, within at least one signal processing module of the wireless communication unit, applying a training signal comprising an envelope that varies with time to an input of the RF transmitter, receiving at least an indication of instantaneous output signal values for the power amplifier module in response to the training signal, calculating instantaneous gain values based at least partly on the received output power values, and adjusting a mapping function between an instantaneous envelope of a waveform signal to be amplified by the power amplifier module and the power amplifier module supply voltage to achieve a power amplifier module gain, for example that is monotonically increasing as a function of power amplifier output power.Type: GrantFiled: August 1, 2013Date of Patent: June 13, 2017Assignee: MediaTek, Inc.Inventors: Sheng-Hong Yan, Paul Cheng Po Liang
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Publication number: 20170005676Abstract: A communication unit comprises a decimator configured to sample a variable control signal and output a reduced bandwidth variable control signal; and a multi-level power supply, MLPS, comprising an input and an output, wherein the input is coupled to the decimator and configured to receive the reduced bandwidth variable control signal and, in response thereto, the output delivers multi-level output voltages to supply a power amplifier, PA, module.Type: ApplicationFiled: June 8, 2016Publication date: January 5, 2017Inventors: Sheng-Hong Yan, Chia-Sheng Peng, Paul Cheng Po Liang
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Patent number: 9520907Abstract: A communication unit comprises a radio frequency, RF, transmitter comprising: a power amplifier, PA, module; an envelope tracking system operably coupled to the PA module and arranged to variably control a supply voltage for the PA module; and a load control system operably coupled to an output of the PA module and arranged to control a power amplifier output load.Type: GrantFiled: February 16, 2014Date of Patent: December 13, 2016Assignee: Mediatek Inc.Inventors: Chia-Sheng Peng, Wei-Cheng Liu, Sheng-Hong Yan, Paul Cheng Po Liang
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Publication number: 20160249300Abstract: Apparatus and methods are provided to calibrate a closed-loop envelop tracking system for a power amplifier of a wireless transmitter using standardized modulation signals. In one novel aspect, a closed-loop adaptive method is used to track changes in PA nonlinearity due to environmental or circuitry changes during operating condition using standardized modulation signals. In one embodiment, the PA supply voltage compensation lookup table (LUT) and/or the phase compensation LUT is updated during normal operation to sustain good linearity and efficiency performance. In another novel aspect, the PA target response is adjusted in response to changes in PA-related system configuration, such as changes in PA bias settings, and/or indicators measured from the transmitter such as changes in impedance or temperature changes for the RF module or the PA module. The PA supply voltage compensation LUT and/or the phase LUT is updated accordingly upon adjustment of the PA target response.Type: ApplicationFiled: February 19, 2015Publication date: August 25, 2016Inventors: Chiou-Wei Tsai, Chia-Sheng Peng, Sheng-Hong Yan
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Patent number: 9288098Abstract: A communication unit has an envelope tracking system operably coupled to a power amplifier, PA, module. The envelope tracking system has at least one slew rate module arranged to re-distribute a slew rate across a number of input samples according to a maximum slew rate of the number of input samples; and a supply modulator arranged to variably control a supply voltage for the PA module in response to an output of the at least one slew rate module.Type: GrantFiled: February 3, 2015Date of Patent: March 15, 2016Assignee: MediaTek, Inc.Inventors: Sheng-Hong Yan, Hao-Ping Hong
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Publication number: 20150303957Abstract: A radio frequency (RF) receiver includes a digital tuning engine; and I-path and Q-path analog filters, tuned by the digital tuning engine. The digital tuning engine gets an I/Q imbalance difference, and the digital tuning engines tunes the I-path analog filter and/or the Q-path analog filter based on the I/Q imbalance difference.Type: ApplicationFiled: June 30, 2015Publication date: October 22, 2015Inventors: Sheng-Hong Yan, Sheng-Hao Chen, Paul Cheng Po Liang, Jen-Che Tsai
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Patent number: 9118535Abstract: A method of configuring at least one frequency dependent (FD), in-phase/quadrature (I/Q), imbalance compensation filter within a radio frequency (RF) module is described. The method includes applying an input signal to an input of the RF module, receiving a filtered I-path signal for the RF module and deriving at least one I-path filtering estimate value therefrom, receiving a filtered Q-path signal for the RF module and deriving at least one Q-path filtering estimate value therefrom, and configuring the at least one FD I/Q imbalance compensation filter based at least partly on at least one ratio between the derived I-path and Q-path filtering estimate values.Type: GrantFiled: March 12, 2014Date of Patent: August 25, 2015Assignee: MediaTek Singapore Pte. Ltd.Inventors: Balachander Narasimhan, Charles Chien, Sheng-Hong Yan, Paul Cheng Po Liang
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Publication number: 20150236729Abstract: A communication unit comprises a radio frequency, RF, transmitter comprising: a power amplifier, PA, module; an envelope tracking system operably coupled to the PA module and arranged to variably control a supply voltage for the PA module; and a load control system operably coupled to an output of the PA module and arranged to control a power amplifier output load.Type: ApplicationFiled: February 16, 2014Publication date: August 20, 2015Applicant: MEDIATEK INC.Inventors: Chia-Sheng Peng, Wei-Cheng Liu, Sheng-Hong Yan, Paul Cheng Po Liang
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Publication number: 20150236877Abstract: A communication unit comprises a radio frequency, RF, transmitter comprising: a power amplifier, PA, module; an envelope tracking system operably coupled to the PA module and arranged to variably control a supply voltage for the PA module; and a load control system operably coupled to an output of the PA module and arranged to control a power amplifier output load.Type: ApplicationFiled: February 14, 2014Publication date: August 20, 2015Applicant: MEDIATEK INC.Inventors: Chia-Sheng Peng, Wei-Cheng Liu, Sheng-Hong Yan, Paul Cheng Po Liang