Patents by Inventor Yu-Hua Liu
Yu-Hua Liu 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: 20240113071Abstract: An integrated circuit package including electrically floating metal lines and a method of forming are provided. The integrated circuit package may include integrated circuit dies, an encapsulant around the integrated circuit dies, a redistribution structure on the encapsulant, a first electrically floating metal line disposed on the redistribution structure, a first electrical component connected to the redistribution structure, and an underfill between the first electrical component and the redistribution structure. A first opening in the underfill may expose a top surface of the first electrically floating metal line.Type: ApplicationFiled: January 5, 2023Publication date: April 4, 2024Inventors: Chung-Shi Liu, Mao-Yen Chang, Yu-Chia Lai, Kuo-Lung Pan, Hao-Yi Tsai, Ching-Hua Hsieh, Hsiu-Jen Lin, Po-Yuan Teng, Cheng-Chieh Wu, Jen-Chun Liao
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Publication number: 20240109803Abstract: The present invention provides a flexible glass and manufacturing method thereof. The flexible glass includes a first straight part and a second straight part on two opposite ends thereof, a recess formed between the first straight part and the second straight part, and a pre-bent curve connection part disposed corresponding to the recess. The first straight part and the second straight part are not arranged on the same plane. The flexible glass has a first lateral side and a second lateral side, and the recess sinks from the first lateral side toward the second lateral side. Therefore, the flexible glass is provided with a greater bendability.Type: ApplicationFiled: September 30, 2022Publication date: April 4, 2024Applicant: CHENFENG OPTRONICS CORPORATIONInventors: CHING-FANG WONG, YU-WEI LIU, WEI-LUN ZENG, KUAN-HUA LIAO
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Publication number: 20230361791Abstract: A sub-circuit of a reconfigurable wireless receiver includes a down-conversion circuit and a plurality of filters. The down-conversion circuit applies down-conversion to a first signal, and generates and outputs a plurality of second signals each derived from down-converting the first signal. The filters are coupled to the down-conversion circuit, and apply filtering to the second signals for generating a plurality of filter outputs, respectively, wherein the filters includes a first filter and a second filter, and the first filter and the second filter have different filter architecture.Type: ApplicationFiled: May 5, 2022Publication date: November 9, 2023Applicant: Airoha Technology Corp.Inventors: Yu-Hua Liu, Shu-Yu Lin
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Patent number: 11764728Abstract: An oscillator includes a first current source, a second current source, a first chopper circuit, a resistive component, a capacitive component, and a processing circuit. The first current source provides a first current. The second current source provides a second current. The first chopper circuit includes a first terminal coupled to the first current source, a second terminal coupled to the second current source, a third terminal coupled to the resistive component, and a fourth terminal coupled to the capacitive component. The processing circuit generates an output clock in response to a first voltage across the resistive component and a second voltage across the capacitive component. The first chopper circuit couples the first terminal and the second terminal to the third terminal and the fourth terminal, respectively and alternately. The resistive component and the capacitive component receive the first current and the second current, respectively and alternately.Type: GrantFiled: April 14, 2022Date of Patent: September 19, 2023Assignee: Airoha Technology Corp.Inventors: Yu-Hua Liu, Yao-Te Chiu
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Patent number: 11437991Abstract: A control circuit for a main switch is provided. The control circuit includes an output voltage tracker, a main switch bias generator, and a reference current device. The output voltage tracker is coupled to the main output end and generates a first tracking voltage positively correlated to an output voltage. The main switch bias generator, in response to the first tracking voltage, generates a second tracking voltage substantially equal to the output voltage. The reference current device is coupled to the main switch bias generator and is used to generate a control voltage on a main control end. The reference current device is used to limit the maximum value of the output current. The main switch and a duplicating switching element of the main switch bias generator form a current mirror configuration circuit. The consuming current of the output voltage tracker is positively correlated to the output current.Type: GrantFiled: May 6, 2021Date of Patent: September 6, 2022Assignee: AIROHA TECHNOLOGY CORP.Inventors: Hung-I Chen, Yu-Hua Liu
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Publication number: 20210359679Abstract: A control circuit for a main switch is provided. The control circuit includes an output voltage tracker, a main switch bias generator, and a reference current device. The output voltage tracker is coupled to the main output end and generates a first tracking voltage positively correlated to an output voltage. The main switch bias generator, in response to the first tracking voltage, generates a second tracking voltage substantially equal to the output voltage. The reference current device is coupled to the main switch bias generator and is used to generate a control voltage on a main control end. The reference current device is used to limit the maximum value of the output current. The main switch and a duplicating switching element of the main switch bias generator form a current mirror configuration circuit. The consuming current of the output voltage tracker is positively correlated to the output current.Type: ApplicationFiled: May 6, 2021Publication date: November 18, 2021Inventors: Hung-I CHEN, Yu-Hua LIU
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Publication number: 20190148540Abstract: A floating gate non-volatile memory device includes at least one floating gate non-volatile memory cell including a semiconductor substrate, a gate stack unit, and a drain and source unit. The gate stack unit includes a tunnel oxide layer having a negative capacitance, a floating gate layer disposed on the tunnel oxide layer, a blocking oxide layer disposed on the floating gate layer and opposite to the tunnel oxide layer, and a control gate layer disposed on the blocking oxide layer and opposite to the floating gate layer. The drain and source unit is disposed in the semiconductor substrate and includes source and drain regions that are respectively disposed on two opposite sides of the gate stack unit.Type: ApplicationFiled: November 13, 2018Publication date: May 16, 2019Applicant: CHANG GUNG UNIVERSITYInventors: Jer-Chyi Wang, Yu-Hua Liu
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Patent number: 10236832Abstract: An audio system includes a reference voltage generation circuit to generate a digital encoding signal and generate an analog reference voltage according to the digital encoding signal, wherein, during a booting procedure and/or a shutdown procedure, the analog reference voltage is smoothly increased and/or decreased at a smooth rate related to a bit number of the digital encoding signal; a first analog operational amplifier for receiving the analog reference voltage to generate a common voltage, which is smoothly increased and/or decreased during the booting procedure and/or the shutdown procedure; and a differential analog operational amplifier pair, coupled to the first analog operational amplifier, for receiving a differential audio input signal pair and outputting a differential output voltage pair to drive a load, wherein, during the booting procedure and/or the shutdown procedure, the differential audio output signal pair is smoothly increased and/or decreased.Type: GrantFiled: June 21, 2018Date of Patent: March 19, 2019Assignee: AIROHA TECHNOLOGY CORP.Inventors: Jia-An Jheng, Yu-Hua Liu, Ya-Ling Yang
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Patent number: 9385675Abstract: The invention provides a power amplifier circuit capable of adjusting gain dynamically. The power amplifier circuit comprises a power supply unit configured to provide a power supply signal; an input power detection unit for receiving at least one input signal and the power supply signal, detecting the power of the input signal to generate a detection signal, and pulling up or down a bias signal by the detection signal; a power amplifier unit for receiving the input signal and the bias signal, adjusting the gain by the controlling of the bias signal, and amplifying the input signal by the adjusted gain to output at least one output signal. Therefore, the gain of power amplifier circuit will be adjusted dynamically by detecting the power of the input signal, so that the output signal conforming to the actual power may be outputted.Type: GrantFiled: May 16, 2014Date of Patent: July 5, 2016Assignee: Airoha Technology Corp.Inventors: Yu-Hua Liu, Ting-Yao Huang, John-San Yang
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Patent number: 9288420Abstract: The present invention provides a digital television signal reception system, comprising a chip having a low-noise amplifier and a master receiver, at least one slave receiver, and at least one local-oscillator leakage processing unit. The chip receives at least one digital input signal of television channel. The low-noise amplifier amplifies and sends the input signal of television channel to the master/slave receiver. The input signal of television channel is frequency-mixed by the master/slave receiver so as to output an output signal of second television channel and an output signal of second television channel. The local-oscillator leakage processing unit detects and removes local-oscillator leakage of the master receiver included in the output signal of second television channel, so as to avoid interference of the local leakage of master receiver on sensitivity of receiving the output signal of second television channel of slave receiver by the slave television.Type: GrantFiled: February 19, 2014Date of Patent: March 15, 2016Assignee: Airoha Technology Corp.Inventors: Heng-Chih Lin, Yu-Hua Liu
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Publication number: 20150288338Abstract: The invention provides a power amplifier circuit capable of adjusting gain dynamically. The power amplifier circuit comprises a power supply unit configured to provide a power supply signal; an input power detection unit for receiving at least one input signal and the power supply signal, detecting the power of the input signal to generate a detection signal, and pulling up or down a bias signal by the detection signal; a power amplifier unit for receiving the input signal and the bias signal, adjusting the gain by the controlling of the bias signal, and amplifying the input signal by the adjusted gain to output at least one output signal. Therefore, the gain of power amplifier circuit will be adjusted dynamically by detecting the power of the input signal, so that the output signal conforming to the actual power may be outputted.Type: ApplicationFiled: May 16, 2014Publication date: October 8, 2015Applicant: AIROHA TECHNOOGY CORP.Inventors: YU-HUA LIU, TING-YAO HUANG, JOHN-SAN YANG
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Publication number: 20150181150Abstract: The present invention provides a digital television signal reception system, comprising a chip having a low-noise amplifier and a master receiver, at least one slave receiver, and at least one local-oscillator leakage processing unit. The chip receives at least one digital input signal of television channel. The low-noise amplifier amplifies and sends the input signal of television channel to the master/slave receiver. The input signal of television channel is frequency-mixed by the master/slave receiver so as to output an output signal of second television channel and an output signal of second television channel. The local-oscillator leakage processing unit detects and removes local-oscillator leakage of the master receiver included in the output signal of second television channel, so as to avoid interference of the local leakage of master receiver on sensitivity of receiving the output signal of second television channel of slave receiver by the slave television.Type: ApplicationFiled: February 19, 2014Publication date: June 25, 2015Applicant: AIROHA TECHNOLOGY CORP.Inventors: HENG-CHIH LIN, YU-HUA LIU
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Publication number: 20150108942Abstract: A chargeable device is disclosed. The chargeable device of the present invention comprises a main circuit module with a coil, and at least one integrated circuit module with a compensation capacitor operated with the coil.Type: ApplicationFiled: May 16, 2014Publication date: April 23, 2015Inventors: HENG-CHIH LIN, YU-HUA LIU
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Patent number: 8374563Abstract: A gain control circuit of the wireless receiver comprises a plurality of stages-amplifier, an analog gain control circuit, and a digital gain control circuit, wherein the analog gain control circuit generates an analog controlling voltage for regulating the gain of the post-amplifier by an analog gain controlling process, and the digital gain control circuit is used for determining a plurality of gain curves for the pre-amplifier, and the gain curves are all operating between the first default voltage and second default voltage. While the analog controlling voltage is over the first default voltage or second default voltage, the gain curve will be switched, thereby, the analog gain controlling process can be with the digital gain controlling process therein for improving the linearity of the gain regulation and reducing the transient response during the gain switching process.Type: GrantFiled: May 21, 2009Date of Patent: February 12, 2013Assignee: Airoha Technology Corp.Inventors: Chan-Sheng Yang, Wen-Shih Lu, Yu-Hua Liu
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Patent number: 7701290Abstract: An amplifier gain control circuit for the wireless transceiver comprises at least one amplifier, an analog to digital converter (ADC), a digital to analog converter (DAC) and a bias circuit, wherein the ADC is used for receiving an analog gain control voltage to generate a digital control signal that can be used for controlling the gain of the amplifier, the DAC is used for receiving the digital signal to generate an analog signal, and the bias circuit is used for receiving the analog signal and the analog gain control voltage to further fine-tune the gain of the amplifier by the analog process for correcting the least bit error during the digital process, therefore, the amplifier during the gain adjustment will be prevented to operate in the nonlinear area.Type: GrantFiled: April 3, 2008Date of Patent: April 20, 2010Assignee: Airoha Technology Corp.Inventor: Yu-Hua Liu
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Publication number: 20100015937Abstract: A gain control circuit of the wireless receiver comprises a plurality of stages-amplifier, an analog gain control circuit, and a digital gain control circuit, wherein the analog gain control circuit generates an analog controlling voltage for regulating the gain of the post-amplifier by an analog gain controlling process, and the digital gain control circuit is used for determining a plurality of gain curves for the pre-amplifier, and the gain curves are all operating between the first default voltage and second default voltage. While the analog controlling voltage is over the first default voltage or second default voltage, the gain curve will be switched, thereby, the analog gain controlling process can be with the digital gain controlling process therein for improving the linearity of the gain regulation and reducing the transient response during the gain switching process.Type: ApplicationFiled: May 21, 2009Publication date: January 21, 2010Applicant: AIROHA TECHNOLOGY CORP.Inventors: Chan-Sheng YANG, Wen-Shih LU, Yu-Hua LIU
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Publication number: 20090167574Abstract: An amplifier gain control circuit for the wireless transceiver comprises at least one amplifier, an analog to digital converter (ADC), a digital to analog converter (DAC) and a bias circuit, wherein the ADC is used for receiving an analog gain control voltage to generate a digital control signal that can be used for controlling the gain of the amplifier, the DAC is used for receiving the digital signal to generate an analog signal, and the bias circuit is used for receiving the analog signal and the analog gain control voltage to further fine-tune the gain of the amplifier by the analog process for correcting the least bit error during the digital process, therefore, the amplifier during the gain adjustment will be prevented to operate in the nonlinear area.Type: ApplicationFiled: April 3, 2008Publication date: July 2, 2009Inventor: Yu-Hua Liu
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Publication number: 20090160539Abstract: A voltage reference circuit comprises a current mirror set, a first resistor, a first MOS transistor, and a second MOS transistor. The output end of the current mirror set is coupled to a first resistor, and the node of the current mirror set is coupled to the first MOS transistor, furthermore, the second MOS transistor is coupled to the first MOS transistor, and the first end and the gate of the second MOS transistor are coupled each other, such that a stable voltage reference will be obtained between the first MOS transistor and the second MOS transistor.Type: ApplicationFiled: April 4, 2008Publication date: June 25, 2009Inventors: Chi-Sung Hsieh, Yu-Hua Liu
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Publication number: 20070135070Abstract: An extended range received signal strength indicator module includes input lines connected to a variable gain amplifier, which passes the amplified RF signal to a polyphase, which in turn passes the filtered signal to a series of RSSI stages. Each RSSI stage includes a log amplifier and outputs an amplified current to a current summer as well as to the next RSSI stage in the series. The current summer outputs the sum of the received currents to RSSI_OUT. An additional frequency filter and RSSI stage with inputs connected to the input lines before the variable gain amplifier that outputs the modified current to the current summer is also included. A control circuit switches the additional RSSI stage on or off as determined by a detection circuit that monitors the value of RSSI_OUT.Type: ApplicationFiled: December 13, 2005Publication date: June 14, 2007Inventors: Tzu-Huan Chiu, Yi-Jen Lin, Yu-Hua Liu
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Patent number: D1025037Type: GrantFiled: November 12, 2021Date of Patent: April 30, 2024Assignee: WISTRON NEWEB CORPORATIONInventors: Hsiao-Fang Liu, Yu-Fu Kuo, Sun-Hua Chang