Patents by Inventor Yung-Chih Yen
Yung-Chih Yen 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: 11860660Abstract: A sub-circuit of a voltage regulator includes a load condition detection circuit and a controllable circuit. The load condition detection circuit is arranged to detect a load transient frequency of a load powered by the voltage regulator, and generate a control signal according to a detection result of the load transient frequency. The controllable circuit is arranged to receive the control signal, wherein an operational behavior of the controllable circuit dynamically changes in response to the control signal.Type: GrantFiled: April 29, 2022Date of Patent: January 2, 2024Assignee: MediaTek Singapore Pte. Ltd.Inventors: Man Pun Chan, Hao-Ping Hong, Yung-Chih Yen, Chien-Hui Wang, Cheng-Hsuan Fan, Jian-Rong Huang
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Patent number: 11677273Abstract: A multi-mode wireless power transmitter includes a first drive circuit of a first type and a second drive circuit of a second type. The first drive circuit is configured to drive a first transmit coil at a first frequency. The second drive circuit is configured to drive a second transmit coil at a second frequency higher than the first frequency.Type: GrantFiled: September 30, 2020Date of Patent: June 13, 2023Assignee: MediaTek Inc.Inventors: Vladimir A. Muratov, Yung-Chih Yen
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Publication number: 20220393587Abstract: A feedback loop circuit of a voltage regulator includes a loadline and a compensation circuit. The loadline generates a feedback signal according to a sensed current signal that provides information of an inductor current of the voltage regulator, and outputs the feedback signal to a controller circuit of the voltage regulator for regulating an output voltage of the voltage regulator. The compensation circuit generates a compensation signal to compensate for a deviation of the output voltage, wherein the feedback signal generated from the loadline is affected by the compensation signal.Type: ApplicationFiled: April 13, 2022Publication date: December 8, 2022Applicant: MediaTek Singapore Pte. Ltd.Inventors: Man Pun Chan, Hao-Ping Hong, Yung-Chih Yen, Chien-Hui Wang, Cheng-Hsuan Fan, Jian-Rong Huang
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Publication number: 20220390973Abstract: A sub-circuit of a voltage regulator includes a load condition detection circuit and a controllable circuit. The load condition detection circuit is arranged to detect a load transient frequency of a load powered by the voltage regulator, and generate a control signal according to a detection result of the load transient frequency. The controllable circuit is arranged to receive the control signal, wherein an operational behavior of the controllable circuit dynamically changes in response to the control signal.Type: ApplicationFiled: April 29, 2022Publication date: December 8, 2022Applicant: MediaTek Singapore Pte. Ltd.Inventors: Man Pun Chan, Hao-Ping Hong, Yung-Chih Yen, Chien-Hui Wang, Cheng-Hsuan Fan, Jian-Rong Huang
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Publication number: 20220337159Abstract: A feedback loop circuit of a voltage regulator includes a voltage extraction circuit and a loop filter circuit. The voltage extraction circuit receives an error voltage signal that is indicative of difference between an output voltage signal and a reference voltage of the voltage regulator, and generates a voltage extraction signal by extracting one representative voltage for one switching cycle of the voltage regulator according to the error voltage signal. The loop filter circuit applies filtering to the voltage extraction signal to set a feedback signal, and output the feedback signal to a controller circuit of the voltage regulator for regulating the output voltage signal.Type: ApplicationFiled: April 12, 2022Publication date: October 20, 2022Applicant: MediaTek Singapore Pte. Ltd.Inventors: Man Pun Chan, Hao-Ping Hong, Yung-Chih Yen
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Patent number: 11290008Abstract: A resonant switched-capacitor converter is provided. The resonant switched-capacitor is configured to convert an input voltage on an input terminal of the resonant switched-capacitor converter into an output voltage on an output terminal of the resonant switched-capacitor converter. The resonant switched-capacitor converter includes a first resonant tank, a second resonant tank, a non-resonant capacitor, and a connection control circuit coupled to the input terminal, the output terminal, the first resonant tank, the second resonant tank and the non-resonant capacitor. The connection control circuit is configured to control connections of the first resonant tank, the second resonant tank and the non-resonant capacitor.Type: GrantFiled: March 24, 2020Date of Patent: March 29, 2022Assignee: MediaTek Singapore Pte. Ltd.Inventors: Alex Jianzhong Chen, Yung-Chih Yen
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Publication number: 20210013741Abstract: A multi-mode wireless power transmitter includes a first drive circuit of a first type and a second drive circuit of a second type. The first drive circuit is configured to drive a first transmit coil at a first frequency. The second drive circuit is configured to drive a second transmit coil at a second frequency higher than the first frequency.Type: ApplicationFiled: September 30, 2020Publication date: January 14, 2021Applicant: MediaTek Inc.Inventors: Vladimir A. Muratov, Yung-Chih Yen
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Patent number: 10826300Abstract: A multi-mode wireless power transmitter includes a first drive circuit of a first type and a second drive circuit of a second type. The first drive circuit is configured to drive a first transmit coil at a first frequency. The second drive circuit is configured to drive a second transmit coil at a second frequency higher than the first frequency.Type: GrantFiled: December 7, 2015Date of Patent: November 3, 2020Assignee: MediaTek Inc.Inventors: Vladimir A. Muratov, Yung-Chih Yen
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Publication number: 20200313550Abstract: A resonant switched-capacitor converter is provided. The resonant switched-capacitor is configured to convert an input voltage on an input terminal of the resonant switched-capacitor converter into an output voltage on an output terminal of the resonant switched-capacitor converter. The resonant switched-capacitor converter includes a first resonant tank, a second resonant tank, a non-resonant capacitor, and a connection control circuit coupled to the input terminal, the output terminal, the first resonant tank, the second resonant tank and the non-resonant capacitor. The connection control circuit is configured to control connections of the first resonant tank, the second resonant tank and the non-resonant capacitor.Type: ApplicationFiled: March 24, 2020Publication date: October 1, 2020Inventors: Alex Jianzhong Chen, Yung-Chih Yen
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Patent number: 10277072Abstract: A wireless power receiver IC in which the power path can be reconfigured as either a low-dropout regulator (LDO), a switched-mode power supply (SMPS) or a power switch (PSW) is provided. All three modes share the same pass device to reduce die area and share the same output terminal to reduce pin. In an inductive wireless receiver, the power path can be reprogrammed on the fly to LDO or PSW mode or can be reprogrammed on the fly to SMPS or PSW mode. In a resonant or multi-mode wireless receiver, the power path can be reprogrammed on the fly to SMPS or PSW mode. Furthermore, to achieve high power transfer efficiency performance, using N-channel MOSFET as its pass device has better efficiency and smaller die area than P-channel MOSFET pass device.Type: GrantFiled: January 8, 2015Date of Patent: April 30, 2019Assignee: MEDIATEK Singapore Pte. Ltd.Inventors: Yung-Chih Yen, Patrick Stanley Riehl, Hasnain Akram, Anand Satyamoorthy
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Patent number: 10177602Abstract: A synchronous rectifier using only n-channel devices in which the low-side switches are effectively cross-coupled using low-side comparators and the high-side switches perform an accurate zero-voltage-switching (ZVS) comparison. The charging path of each bootstrap domain is completed through the low-side switches, which are each always on for every half-cycle independent of loading. This scheme gives rectifier efficiency gain because a) each bootstrap domain receives maximum charging time, and b) the charging occurs through a switch rather than a diode. Both these factors ensure the bootstrap domain is fully charged, thereby reducing conduction losses through the rectifier switches. Furthermore, settings may be adjusted by software to optimize the resistive and capacitive losses of the rectifier. Using data for die temperature and operating frequency, software can create a feedback loop, dynamically adjusting rectifier settings in order to achieve the best possible efficiency.Type: GrantFiled: January 8, 2015Date of Patent: January 8, 2019Assignee: Mediatek Singapore PTE, Ltd.Inventors: Hasnain Akram, Yung-Chih Yen, Patrick Stanley Riehl, Anand Satyamoorthy
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Patent number: 10084345Abstract: A resonant wireless power (RWP) system is provided that includes a signal generator that provides an input signal waveform. An amplifier structure amplifies signals for transmissions to a receiver that is powered from a fixed DC voltage supply. The amplifier structure is operated either using differential or single-ended amplifiers to provide two different output power levels, in burst mode to provide a range of output power levels, or using a capacitor in a matching network that is adjusted to provide a range of output power levels.Type: GrantFiled: March 14, 2014Date of Patent: September 25, 2018Assignee: MEDIATEK Singapore Pte. Ltd.Inventors: Patrick Stanley Riehl, Anand Satyamoorthy, Yung-Chih Yen
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Patent number: 9954400Abstract: A synchronous rectifier using only n-channel devices in which the low-side switches are effectively cross-coupled using low-side comparators and the high-side switches perform an accurate zero-voltage-switching (ZVS) comparison. The charging path of each bootstrap domain is completed through the low-side switches, which are each always on for every half-cycle independent of loading. This scheme gives rectifier efficiency gain because a) each bootstrap domain receives maximum charging time, and b) the charging occurs through a switch rather than a diode. Both these factors ensure the bootstrap domain is fully charged, thereby reducing conduction losses through the rectifier switches. Furthermore, settings may be adjusted by software to optimize the resistive and capacitive losses of the rectifier. Using data for die temperature and operating frequency, software can create a feedback loop, dynamically adjusting rectifier settings in order to achieve the best possible efficiency.Type: GrantFiled: January 8, 2015Date of Patent: April 24, 2018Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: Hasnain Akram, Yung-Chih Yen, Patrick Stanley Riehl, Anand Satyamoorthy
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Patent number: 9559583Abstract: A power converter includes a wave generator, a low pass filter, a first control circuit, and a second control circuit. The wave generator receives an input voltage, and converts the input signal into a wave signal according to a first control signal and a second control signal. The low pass filter filters the wave signal to generate an output voltage. The first control circuit generates the first control signal according to the wave signal and the output voltage. The second control circuit generates the second control signal according to the wave signal and the output voltage.Type: GrantFiled: January 13, 2014Date of Patent: January 31, 2017Assignee: MEDIATEK INC.Inventors: Hung-chih Lin, Hung-I Wang, Hao-Ping Hong, Chien-Wei Kuan, Yung-Chih Yen
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Publication number: 20170018936Abstract: A multi-mode wireless power transmitter includes a first drive circuit of a first type and a second drive circuit of a second type. The first drive circuit is configured to drive a first transmit coil at a first frequency. The second drive circuit is configured to drive a second transmit coil at a second frequency higher than the first frequency.Type: ApplicationFiled: December 7, 2015Publication date: January 19, 2017Applicant: MediaTek Inc.Inventors: Vladimir A. Muratov, Yung-Chih Yen
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Publication number: 20160299521Abstract: A synchronous rectifier using only n-channel devices in which the low-side switches are effectively cross-coupled using low-side comparators and the high-side switches perform an accurate zero-voltage-switching (ZVS) comparison. The charging path of each bootstrap domain is completed through the low-side switches, which are each always on for every half-cycle independent of loading. This scheme gives rectifier efficiency gain because a) each bootstrap domain receives maximum charging time, and b) the charging occurs through a switch rather than a diode. Both these factors ensure the bootstrap domain is fully charged, thereby reducing conduction losses through the rectifier switches. Furthermore, settings may be adjusted by software to optimize the resistive and capacitive losses of the rectifier. Using data for die temperature and operating frequency, software can create a feedback loop, dynamically adjusting rectifier settings in order to achieve the best possible efficiency.Type: ApplicationFiled: January 8, 2015Publication date: October 13, 2016Inventors: HASNAIN AKRAM, Yung-Chih Yen, Patrick Stanley Riehl, Anand Satyamoorthy
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Publication number: 20160013660Abstract: A resonant wireless power (RWP) system is provided that includes a signal generator that provides an input signal waveform. An amplifier structure amplifies signals for transmissions to a receiver that is powered from a fixed DC voltage supply. The amplifier structure is operated either using differential or single-ended amplifiers to provide two different output power levels, in burst mode to provide a range of output power levels, or using a capacitor in a matching network that is adjusted to provide a range of output power levels.Type: ApplicationFiled: March 14, 2014Publication date: January 14, 2016Inventors: Patrick Stanley RIEHL, Anand SATYAMOORTHY, Yung-Chih YEN
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Publication number: 20150364928Abstract: A wireless power receiver IC in which the power path can be reconfigured as either a low-dropout regulator (LDO), a switched-mode power supply (SMPS) or a power switch (PSW) is provided. All three modes share the same pass device to reduce die area and share the same output terminal to reduce pin. In an inductive wireless receiver, the power path can be reprogrammed on the fly to LDO or PSW mode or can be reprogrammed on the fly to SMPS or PSW mode. In a resonant or multi-mode wireless receiver, the power path can be reprogrammed on the fly to SMPS or PSW mode. Furthermore, to achieve high power transfer efficiency performance, using N-channel MOSFET as its pass device has better efficiency and smaller die area than P-channel MOSFET pass device.Type: ApplicationFiled: January 8, 2015Publication date: December 17, 2015Inventors: Yung-Chih Yen, Patrick Stanley Riehl, HASNAIN AKRAM, Anand Satyamoorthy
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Publication number: 20150244200Abstract: A method for performing wireless charging control of an electronic device and an associated apparatus are provided, where the method includes the steps of: performing at least one frequency detection operation according to at least one signal of the electronic device to generate at least one detection result; and determining a specific set of program codes within a plurality of sets of program codes to be an active set of program codes according to the aforementioned at least one detection result, and loading the specific set of program codes from a non-volatile (NV) memory of the electronic device, to control wireless charging operations of the electronic device. For example, the aforementioned at least one signal of the electronic device can be at least one induced signal of a power input coil of the electronic device or at least one derivative of the aforementioned at least one induced signal.Type: ApplicationFiled: November 27, 2014Publication date: August 27, 2015Inventors: Kuan-Kai Juan, Patrick Stanley Riehl, Anand Satyamoorthy, Yung-Chih Yen, Yuh-Long Yeh, Hung-Yen Chen, Jui-Ching Yang
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Publication number: 20150200608Abstract: A power converter includes a wave generator, a low pass filter, a first control circuit, and a second control circuit. The wave generator receives an input voltage, and converts the input signal into a wave signal according to a first control signal and a second control signal. The low pass filter filters the wave signal to generate an output voltage. The first control circuit generates the first control signal according to the wave signal and the output voltage. The second control circuit generates the second control signal according to the wave signal and the output voltage.Type: ApplicationFiled: January 13, 2014Publication date: July 16, 2015Applicant: Media Tek Inc.Inventors: Hung-chih LIN, Hung-I WANG, Hao-Ping HONG, Chien-Wei KUAN, Yung-Chih YEN