Patents by Inventor Chao-Huang Wu
Chao-Huang Wu 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: 11223328Abstract: A dual-mode signal amplifying circuit includes: a first and a second input terminals for receiving differential input signals; two output terminals for providing differential output signals; a first through a third current sources; a first switch positioned between the first current source and a first node, and controlled by the first input terminal; a second switch positioned between the first current source and a second node, and controlled by the second input terminal; a third switch positioned between the first node and a fixed-voltage terminal, and controlled by a third node; a fourth switch positioned between the second node and a fixed-voltage terminal and controlled by the third node; a fifth switch positioned between the second current source and a fixed-voltage terminal, and controlled by the first node; and a sixth switch positioned between the third current source and a fixed-voltage terminal, and controlled by the second node.Type: GrantFiled: July 21, 2020Date of Patent: January 11, 2022Assignee: REALTEK SEMICONDUCTOR CORP.Inventors: Chao-Huang Wu, Yi-Shao Chang, Han-Chang Kang, Ka-Un Chan
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Patent number: 11012167Abstract: A receiving device comprises a first receiving circuit, for receiving a plurality of signals and comparing a plurality of signal powers of the plurality of signals with a first threshold, to generate a first plurality of comparison results; a second receiving circuit, for receiving the plurality of signals and comparing the plurality of signal powers of the plurality of signals with a second threshold, to generate a second plurality of comparison results, wherein the first threshold is smaller than the second threshold; and a control circuit, coupled to the first receiving circuit and the second receiving circuit, for determining whether an average signal power of the plurality of signals is greater than a reference power according to the first plurality of comparison results and the second plurality of comparison results, to generate a determination result.Type: GrantFiled: August 27, 2018Date of Patent: May 18, 2021Assignee: Realtek Semiconductor Corp.Inventors: Chao-Huang Wu, Han-Chang Kang, Ka-Un Chan
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Publication number: 20200350872Abstract: A dual-mode signal amplifying circuit includes: a first and a second input terminals for receiving differential input signals; two output terminals for providing differential output signals; a first through a third current sources; a first switch positioned between the first current source and a first node, and controlled by the first input terminal; a second switch positioned between the first current source and a second node, and controlled by the second input terminal; a third switch positioned between the first node and a fixed-voltage terminal, and controlled by a third node; a fourth switch positioned between the second node and a fixed-voltage terminal and controlled by the third node; a fifth switch positioned between the second current source and a fixed-voltage terminal, and controlled by the first node; and a sixth switch positioned between the third current source and a fixed-voltage terminal, and controlled by the second node.Type: ApplicationFiled: July 21, 2020Publication date: November 5, 2020Applicant: Realtek Semiconductor Corp.Inventors: Chao-Huang WU, Yi-Shao CHANG, Han-Chang KANG, Ka-Un CHAN
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Patent number: 10819289Abstract: A signal processing circuit includes a signal receiving circuit for generating a first input signal and a second input signal; a signal output circuit for generating a first output signal and a second output signal according to the first input signal and the second input signal; a negative impedance circuit, for amplifying the first input signal at the first input terminal to generate a first amplified input signal at the second output terminal, and for amplifying the second input signal at the second input terminal to generate a second amplified input signal at the first output terminal; a first capacitor; a second capacitor; wherein the first capacitor and the second capacitor have different DC voltage levels at both terminals, such that the impedance-signal variation rate of the negative impedance circuit is lower than a predetermined level.Type: GrantFiled: May 14, 2020Date of Patent: October 27, 2020Assignee: Realtek Semiconductor Corp.Inventors: Chao-Huang Wu, Ka-Un Chan
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Patent number: 10763793Abstract: A dual-mode signal amplifying circuit includes: a first and a second input terminals for receiving differential input signals; two output terminals for providing differential output signals; a first through a third current sources; a first switch positioned between the first current source and a first node, and controlled by the first input terminal; a second switch positioned between the first current source and a second node, and controlled by the second input terminal; a third switch positioned between the first node and a fixed-voltage terminal, and controlled by a third node; a fourth switch positioned between the second node and a fixed-voltage terminal, and controlled by the third node; a fifth switch positioned between the second current source and a fixed-voltage terminal, and controlled by the first node; and a sixth switch positioned between the third current source and a fixed-voltage terminal, and controlled by the second node.Type: GrantFiled: October 16, 2018Date of Patent: September 1, 2020Assignee: REALTEK SEMICONDUCTOR CORP.Inventors: Chao-Huang Wu, Yi-Shao Chang, Han-Chang Kang, Ka-Un Chan
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Publication number: 20200212845Abstract: The present invention discloses a mixer bias circuit including a first reference voltage generation circuit, an amplifier, a first transistor array, a first switch array, a second reference voltage generation circuit, a second transistor array, a second switch array, a first resistive component, and a second resistive component. The mixer bias circuit provides multiple bias voltages by dynamically tracking the common mode voltage of a trans-impedance amplifier (TIA) and compensates for imbalance and mismatch effects by asymmetrically trimming the bias voltages to improve the second-order intercept point of a radio frequency (RF) receiver front-end (RXFE).Type: ApplicationFiled: December 30, 2019Publication date: July 2, 2020Inventors: KA-UN CHAN, RONG-FU YEH, CHAO-HUANG WU
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Patent number: 10700641Abstract: The present invention discloses a mixer bias circuit including a first reference voltage generation circuit, an amplifier, a first transistor array, a first switch array, a second reference voltage generation circuit, a second transistor array, a second switch array, a first resistive component, and a second resistive component. The mixer bias circuit provides multiple bias voltages by dynamically tracking the common mode voltage of a trans-impedance amplifier (TIA) and compensates for imbalance and mismatch effects by asymmetrically trimming the bias voltages to improve the second-order intercept point of a radio frequency (RF) receiver front-end (RXFE).Type: GrantFiled: December 30, 2019Date of Patent: June 30, 2020Assignee: REALTEK SEMICONDUCTOR CORPORATIONInventors: Ka-Un Chan, Rong-Fu Yeh, Chao-Huang Wu
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Publication number: 20190190628Abstract: A receiving device comprises a first receiving circuit, for receiving a plurality of signals and comparing a plurality of signal powers of the plurality of signals with a first threshold, to generate a first plurality of comparison results; a second receiving circuit, for receiving the plurality of signals and comparing the plurality of signal powers of the plurality of signals with a second threshold, to generate a second plurality of comparison results, wherein the first threshold is smaller than the second threshold; and a control circuit, coupled to the first receiving circuit and the second receiving circuit, for determining whether an average signal power of the plurality of signals is greater than a reference power according to the first plurality of comparison results and the second plurality of comparison results, to generate a determination result.Type: ApplicationFiled: August 27, 2018Publication date: June 20, 2019Inventors: Chao-Huang Wu, Han-Chang Kang, Ka-Un Chan
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Publication number: 20190140601Abstract: A dual-mode signal amplifying circuit includes: a first and a second input terminals for receiving differential input signals; two output terminals for providing differential output signals; a first through a third current sources; a first switch positioned between the first current source and a first node, and controlled by the first input terminal; a second switch positioned between the first current source and a second node, and controlled by the second input terminal; a third switch positioned between the first node and a fixed-voltage terminal, and controlled by a third node; a fourth switch positioned between the second node and a fixed-voltage terminal, and controlled by the third node; a fifth switch positioned between the second current source and a fixed-voltage terminal, and controlled by the first node; and a sixth switch positioned between the third current source and a fixed-voltage terminal, and controlled by the second node.Type: ApplicationFiled: October 16, 2018Publication date: May 9, 2019Applicant: Realtek Semiconductor Corp.Inventors: Chao-Huang WU, Yi-Shao CHANG, Han-Chang KANG, Ka-Un CHAN
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Patent number: 8427587Abstract: A tracking filter includes a first buffer, an impedance transformer, an inductor, a first capacitive unit, a second capacitive unit and a second buffer. The first buffer has an input terminal for receiving an input signal. The impedance transformer is connected with an output terminal of the first buffer. The inductor is connected with a second terminal of the impedance transformer. The first capacitive unit is interconnected between the impedance transformer and a ground terminal. The second capacitive unit is interconnected between the inductor and the ground terminal. The second buffer is connected with the inductor for generating an output signal. When specified values of the impedance transformer, the first capacitive unit and the second capacitive unit are simultaneously increased, an operating frequency of the output signal is decreased, so that a gain value of the output signal to the input signal is maintained constant.Type: GrantFiled: March 24, 2011Date of Patent: April 23, 2013Assignee: Sunplus Technology Co., Ltd.Inventor: Chao-Huang Wu
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Publication number: 20110242431Abstract: A tracking filter includes a first buffer, an impedance transformer, an inductor, a first capacitive unit, a second capacitive unit and a second buffer. The first buffer has an input terminal for receiving an input signal. The impedance transformer is connected with an output terminal of the first buffer. The inductor is connected with a second terminal of the impedance transformer. The first capacitive unit is interconnected between the impedance transformer and a ground terminal. The second capacitive unit is interconnected between the inductor and the ground terminal. The second buffer is connected with the inductor for generating an output signal. When specified values of the impedance transformer, the first capacitive unit and the second capacitive unit are simultaneously increased, an operating frequency of the output signal is decreased, so that a gain value of the output signal to the input signal is maintained constant.Type: ApplicationFiled: March 24, 2011Publication date: October 6, 2011Applicant: Sunplus Technology Co., Ltd.Inventor: Chao-Huang Wu
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Patent number: 7585145Abstract: A panel transfer apparatus is provided. The panel transfer apparatus includes a base having a sliding mechanism and a carrier device disposed on the sliding mechanism. The carrier device further includes a plurality of carrier seat, a plurality of sucker sets disposed on the carrier seat, a plurality of sliding rails disposed on the carrier seat, and a plurality of transfer robots disposed on the plurality of sliding rails for placing panels. The panel transfer apparatus provides an. apparatus through which issue of fall-down panels and lowered production yield of the panels, disadvantages of marks and thus uneven brightness left on the panels resulted during panel delivery may be addressed and panels of different sizes may be transported to increase the panel production amount.Type: GrantFiled: December 29, 2005Date of Patent: September 8, 2009Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Te-Hsin Huang, Chao-Huang Wu
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Patent number: 7497317Abstract: A conveying and raising apparatus includes a conveying mechanism and a raising mechanism. The conveying mechanism includes a roller for conveying a first object while rotating, and a motor for rotating the roller. The raising mechanism includes a frame installed beside the roller, a plurality of pins fixed on the frame, and an actuator connected to the frame for raising a second object above the plurality of pins from a first height to a second height. The frame has an opening capable of allowing the first object to pass through.Type: GrantFiled: November 2, 2005Date of Patent: March 3, 2009Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Sou-Chen Chang, Chao-Huang Wu
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Publication number: 20070154297Abstract: A panel transfer apparatus is provided. The panel transfer apparatus includes a base having a sliding mechanism and a carrier device disposed on the sliding mechanism. The carrier device further includes a plurality of carrier seat, a plurality of sucker sets disposed on the carrier seat, a plurality of sliding rails disposed on the carrier seat, and a plurality of transfer robots disposed on the plurality of sliding rails for placing panels. The panel transfer apparatus provides an. apparatus through which issue of fall-down panels and lowered production yield of the panels, disadvantages of marks and thus uneven brightness left on the panels resulted during panel delivery may be addressed and panels of different sizes may be transported to increase the panel production amount.Type: ApplicationFiled: December 29, 2005Publication date: July 5, 2007Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: Te-Hsin Huang, Chao-Huang Wu
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Publication number: 20070098539Abstract: A conveying and raising apparatus includes a conveying mechanism and a raising mechanism. The conveying mechanism includes a roller for conveying a first object while rotating, and a motor for rotating the roller. The raising mechanism includes a frame installed beside the roller, a plurality of pins fixed on the frame, and an actuator connected to the frame for raising a second object above the plurality of pins from a first height to a second height. The frame has an opening capable of allowing the first object to pass through.Type: ApplicationFiled: November 2, 2005Publication date: May 3, 2007Inventors: Sou-Chen Chang, Chao-Huang Wu
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Patent number: 7188721Abstract: An adjustment apparatus, which is able to adjust a substrate position. The apparatus includes a plurality of transport rails, a plurality of rollers on each transport rail, a pin up device and an adjustment device. The roller is transported the glass substrate, a pin and a joinball of the pin up device are supported and are raised the substrate from the roller. Finally, an adjustment device can adjust the glass substrate.Type: GrantFiled: February 10, 2006Date of Patent: March 13, 2007Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Chao-Huang Wu, Shao-Hung Yang