Patents by Inventor Yu-Jiu Wang

Yu-Jiu Wang 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).

  • Patent number: 9515571
    Abstract: A current-rectifying device includes a switching component and an impedance transformer. A conductance between first and second nodes of the switching component is controlled based on a voltage between high-impedance control and control-reference nodes of the switching component to determine an amount of current that is permitted to flow between the first and second nodes. The impedance transformer includes a positive input node electrically connected to one of the first and second nodes based on AC voltage swings, a negative input node, a positive output node electrically connected to the high-impedance control node, and a negative output node, and which senses an AC voltage swing derived from the AC input voltage with the positive input node and the negative input node, and provides an AC voltage swing between the high-impedance control and control-reference nodes that is greater than the AC voltage swing derived from the AC input voltage.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: December 6, 2016
    Assignee: National Chiao Tung University
    Inventors: Yu-Jiu Wang, I-No Liao, Chao-Han Tsai, Chatrpol Pakasiri
  • Publication number: 20160315593
    Abstract: A bias circuit is adapted for biasing a to-be-biased transconductance cell such that the to-be-biased transconductance cell has a constant transconductance, and includes a converter and a controller. The converter receives first and second current signals, and generates, based on the first and second current signals, a first voltage signal, a second voltage signal and a bias voltage that is for biasing the to-be-biased transconductance cell. The controller receives the first and second voltage signals from the converter, generates the first and second current signals for the converter based on the first and second voltage signals so as to make a magnitude of the first voltage signal equal a magnitude of the second voltage signal.
    Type: Application
    Filed: July 5, 2016
    Publication date: October 27, 2016
    Inventors: Yu-Jiu Wang, Ching-Yun CHU
  • Patent number: 9413297
    Abstract: A bias circuit is adapted for biasing a to-be-biased transconductance cell such that the to-be-biased transconductance cell has a constant transconductance, and includes a converter and a controller. The converter receives first and second current signals, and generates, based on the first and second current signals, a first voltage signal, a second voltage signal and a bias voltage that is for biasing the to-be-biased transconductance cell. The controller receives the first and second voltage signals from the converter, generates the first and second current signals for the converter based on the first and second voltage signals so as to make a magnitude of the first voltage signal equal a magnitude of the second voltage signal.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: August 9, 2016
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Yu-Jiu Wang, Ching-Yun Chu
  • Publication number: 20150256131
    Abstract: A bias circuit is adapted for biasing a to-be-biased transconductance cell such that the to-be-biased transconductance cell has a constant transconductance, and includes a converter and a controller. The converter receives first and second current signals, and generates, based on the first and second current signals, a first voltage signal, a second voltage signal and a bias voltage that is for biasing the to-be-biased transconductance cell. The controller receives the first and second voltage signals from the converter, generates the first and second current signals for the converter based on the first and second voltage signals so as to make a magnitude of the first voltage signal equal a magnitude of the second voltage signal.
    Type: Application
    Filed: March 6, 2015
    Publication date: September 10, 2015
    Inventors: Yu-Jiu Wang, Ching-Yun CHU
  • Publication number: 20150194907
    Abstract: A current-rectifying device includes a switching component and an impedance transformer. A conductance between first and second nodes of the switching component is controlled based on a voltage between high-impedance control and control-reference nodes of the switching component to determine an amount of current that is permitted to flow between the first and second nodes. The impedance transformer includes a positive input node electrically connected to one of the first and second nodes based on AC voltage swings, a negative input node, a positive output node electrically connected to the high-impedance control node, and a negative output node, and which senses an AC voltage swing derived from the AC input voltage with the positive input node and the negative input node, and provides an AC voltage swing between the high-impedance control and control-reference nodes that is greater than the AC voltage swing derived from the AC input voltage.
    Type: Application
    Filed: January 7, 2015
    Publication date: July 9, 2015
    Inventors: Yu-Jiu Wang, I-No Liao, Chao-Han Tsai, Chatrpol Pakasiri
  • Patent number: 8331886
    Abstract: An integrated multi-core RF device includes a common amplifier which outputs an amplified RF signal. A common transmission line is configured to supply the amplified RF signal to a plurality of common transmission line distribution connections. Each receiver core of a plurality of receiver cores has a receiver core RF input coupled to one of the plurality of common transmission line distribution connections. Each core is configured to be tunable to a channel and to output at least one baseband output per channel. The integrated multi-core RF device is configured to concurrently down convert a plurality of channels to corresponding down converted baseband signals. The integrated multi-core RF device is configured to allow dynamic selection of the one or more of the plurality of channels over time. A method to recover a DSCC receiver IC is also described.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: December 11, 2012
    Assignee: California Institute of Technology
    Inventors: Yu-Jiu Wang, Seyed Ali Hajimiri
  • Patent number: 8305106
    Abstract: Systems and methods for providing self-healing integrated circuits. The method is characterized in that the behavior of a circuit or a device in response to an input signal is observed. One or more operational parameters or characteristics of the circuit or the device are derived. A corrective action to bring the operational parameters or characteristics of the circuit or device within a desired range is deduced, if needed. The corrective action can be the application of a correction signal or a modification of one or more parameters or characteristics of an element in the circuit. The calculated corrective action, if needed, is applied to bring the operational parameters or characteristics of the circuit or device within the desired range. Optionally, the operational parameters or characteristics of the circuit or the device after the correction is effectuated can be checked.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: November 6, 2012
    Assignee: California Institute of Technology
    Inventors: Florian Bohn, Seyed Ali Hajimiri, Hua Wang, Yu-Jiu Wang
  • Patent number: 8208527
    Abstract: The invention relates to a reconfigurable continuous FIR filter. The reconfigurable continuous FIR filter includes a delay line including at least two delay elements coupled in cascade. The reconfigurable continuous FIR filter also includes a filter section including at least three gain-phase elements. The filter section also includes a summing circuit having a plurality of inputs at least equal in number to the at least three gain-phase elements and one output. The reconfigurable continuous FIR filter is configured to exhibit a filter transfer function that is reconfigurable in real time. The invention also related to down-converters using the reconfigurable continuous FIR filter. The invention also related to electromagnetic wave receivers using the reconfigurable continuous FIR filter. The invention also relates to a method for reconfigurable real time continuous filtering.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: June 26, 2012
    Assignee: California Institute of Technology
    Inventors: Yu-Jiu Wang, Seyed Ali Hajimiri
  • Publication number: 20110057682
    Abstract: Systems and methods for providing self-healing integrated circuits. The method is characterized in that the behavior of a circuit or a device in response to an input signal is observed. One or more operational parameters or characteristics of the circuit or the device are derived. A corrective action to bring the operational parameters or characteristics of the circuit or device within a desired range is deduced, if needed. The corrective action can be the application of a correction signal or a modification of one or more parameters or characteristics of an element in the circuit. The calculated corrective action, if needed, is applied to bring the operational parameters or characteristics of the circuit or device within the desired range. Optionally, the operational parameters or characteristics of the circuit or the device after the correction is effectuated can be checked.
    Type: Application
    Filed: August 24, 2010
    Publication date: March 10, 2011
    Applicant: California Institute of Technology
    Inventors: Florian Bohn, Seyed Ali Hajimiri, Hua Wang, Yu-Jiu Wang
  • Publication number: 20100075622
    Abstract: An integrated multi-core RF device includes a common amplifier which outputs an amplified RF signal. A common transmission line is configured to supply the amplified RF signal to a plurality of common transmission line distribution connections. Each receiver core of a plurality of receiver cores has a receiver core RF input coupled to one of the plurality of common transmission line distribution connections. Each core is configured to be tunable to a channel and to output at least one baseband output per channel. The integrated multi-core RF device is configured to concurrently down convert a plurality of channels to corresponding down converted baseband signals. The integrated multi-core RF device is configured to allow dynamic selection of the one or more of the plurality of channels over time. A method to recover a DSCC receiver IC is also described.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 25, 2010
    Applicant: California Institute of Technology
    Inventors: Yu-Jiu Wang, Seyed Ali Hajimiri
  • Publication number: 20090052597
    Abstract: The invention relates to a reconfigurable continuous FIR filter. The reconfigurable continuous FIR filter includes a delay line including at least two delay elements coupled in cascade. The reconfigurable continuous FIR filter also includes a filter section including at least three gain-phase elements. The filter section also includes a summing circuit having a plurality of inputs at least equal in number to the at least three gain-phase elements and one output. The reconfigurable continuous FIR filter is configured to exhibit a filter transfer function that is reconfigurable in real time. The invention also related to down-converters using the reconfigurable continuous FIR filter. The invention also related to electromagnetic wave receivers using the reconfigurable continuous FIR filter. The invention also relates to a method for reconfigurable real time continuous filtering.
    Type: Application
    Filed: January 30, 2008
    Publication date: February 26, 2009
    Applicant: California Institute of Technology
    Inventors: Yu-Jiu Wang, Seyed Ali Hajimiri
  • Patent number: 6801108
    Abstract: The present invention provides a millimeter-wave passive FET switch by using impedance transformation network to transfer the effective capacitance seen from the drain to source of an FET at off-state to low impedance, while transfer low impedance seen at on-state to high impedance. Since both on-state and off-state are transferred to high impedance, and low impedance respectively, a high-performance switch can be achieved. Since the size of the transformation network is small, the performance of the switch can be promoted with low cost.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: October 5, 2004
    Assignee: Taiwan University
    Inventors: Huei Wang, Yu-Jiu Wang, Kun-You Lin
  • Publication number: 20030112102
    Abstract: The present invention provides a millimeter-wave passive FET switch by using impedance transformation network to transfer the effective capacitance seen from the drain to source of an FET at off-state to low impedance, while transfer low impedance seen at on-state to high impedance. Since both on-state and off-state are transferred to high impedance, and low impedance respectively, a high-performance switch can be achieved. Since the size of the transformation network is small, the performance of the switch can be promoted with low cost.
    Type: Application
    Filed: December 14, 2001
    Publication date: June 19, 2003
    Applicant: Taiwan University
    Inventors: Huei Wang, Yu-Jiu Wang, Kun-You Lin