Patents by Inventor Chu-Hsiung Ho

Chu-Hsiung Ho 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).

  • Publication number: 20180343007
    Abstract: A power amplifier module includes a transistor and transistor control circuitry configured to receive an internal regulator voltage and provide the internal regulator voltage to control the transistor in a stand-by mode of operation.
    Type: Application
    Filed: August 3, 2018
    Publication date: November 29, 2018
    Inventor: Chu-hsiung HO
  • Patent number: 10069492
    Abstract: A radio-frequency switch includes a series field-effect transistor, a shunt field-effect transistor having a gate node, and shunt arm control circuitry configured to receive an internal regulator voltage and provide the internal regulator voltage to the gate node of the shunt field-effect transistor when the radio-frequency switch is in a stand-by mode of operation.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: September 4, 2018
    Assignee: Skyworks Solutions, Inc.
    Inventor: Chu-hsiung Ho
  • Patent number: 9871512
    Abstract: Systems, apparatuses and methods are disclosed providing a semiconductor die comprising a semiconductor substrate and a radio-frequency (RF) switch including one or more series field-effect transistors (FETs) and one or more shunt FETs, each of the one or more series FETs and one or more shunt FETs having a respective gate node, the RF switch being configured to receive an RF signal from a power amplifier module and provide the RF signal to an antenna. The semiconductor die may further comprise an internal regulator voltage source configured to provide an internal regulator voltage when the RF switch is in a stand-by mode and shunt arm control circuitry configured to provide the internal regulator voltage to the gate nodes of the one or more shunt FETs when the RF switch is in the stand-by mode.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: January 16, 2018
    Assignee: Skyworks Solutions, Inc.
    Inventor: Chu-hsiung Ho
  • Publication number: 20180013420
    Abstract: A radio-frequency switch includes a series field-effect transistor, a shunt field-effect transistor having a gate node, and shunt arm control circuitry configured to receive an internal regulator voltage and provide the internal regulator voltage to the gate node of the shunt field-effect transistor when the radio-frequency switch is in a stand-by mode of operation.
    Type: Application
    Filed: September 7, 2017
    Publication date: January 11, 2018
    Inventor: Chu-hsiung HO
  • Publication number: 20160065206
    Abstract: Systems, apparatuses and methods are disclosed providing a semiconductor die comprising a semiconductor substrate and a radio-frequency (RF) switch including one or more series field-effect transistors (FETs) and one or more shunt FETs, each of the one or more series FETs and one or more shunt FETs having a respective gate node, the RF switch being configured to receive an RF signal from a power amplifier module and provide the RF signal to an antenna. The semiconductor die may further comprise an internal regulator voltage source configured to provide an internal regulator voltage when the RF switch is in a stand-by mode and shunt arm control circuitry configured to provide the internal regulator voltage to the gate nodes of the one or more shunt FETs when the RF switch is in the stand-by mode.
    Type: Application
    Filed: August 28, 2015
    Publication date: March 3, 2016
    Inventor: Chu-hsiung HO
  • Patent number: 8629725
    Abstract: Power amplifier (PA), regardless of the process used for the manufacturing of its devices, suffers from a nonlinear output capacitance that has significant impact on various aspects of the PA performance. This output capacitance is dependent on the large output voltage swing. Accordingly a compensation capacitance is added at the output of the PA that has a behavior that is inverse respective of the output voltage of that of the output capacitance of the PA. Connecting the compensation capacitor in parallel to the PA output capacitance, results in a total capacitance that is the sum of the output capacitance and its compensation capacitance. The total output capacitance is therefore essentially stable throughout the output voltage swing.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: January 14, 2014
    Assignee: RF Micro Devices (Cayman Islands), Ltd.
    Inventors: Baker Scott, George Maxim, Chu Hsiung Ho, Stephen Franck, Tom Biedka
  • Patent number: 8604873
    Abstract: Achievement of robust stability of a power amplifier (PA) that allows the sharing of the ground between the driver stages and the output stage is shown. A controlled amount of negative feedback is used to neutralize the local positive feedback that results from the driver-to-output stage ground sharing in the signal path, for example, a radio frequency (RF) signal path. The solution keeps a strong drive and a good performance of the PA. Exemplary embodiments are shown for the PA positive feedback neutralization. A first embodiment uses a ground signal divider while another embodiment uses a ground signal divider weighting technique.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: December 10, 2013
    Assignee: RF Micro Devices (Cayman Islands), Ltd.
    Inventors: Baker Scott, George Maxim, Stephen Franck, Chu Hsiung Ho
  • Publication number: 20120146722
    Abstract: Power amplifier (PA), regardless of the process used for the manufacturing of its devices, suffers from a nonlinear output capacitance that has significant impact on various aspects of the PA performance. This output capacitance is dependent on the large output voltage swing. Accordingly a compensation capacitance is added at the output of the PA that has a behavior that is inverse respective of the output voltage of that of the output capacitance of the PA. Connecting the compensation capacitor in parallel to the PA output capacitance, results in a total capacitance that is the sum of the output capacitance and its compensation capacitance. The total output capacitance is therefore essentially stable throughout the output voltage swing.
    Type: Application
    Filed: December 2, 2011
    Publication date: June 14, 2012
    Applicant: AMALFI SEMICONDUCTOR, INC.
    Inventors: Baker Scott, George Maxim, Chu Hsiung Ho, Stephen Franck, Tom Biedka
  • Publication number: 20120139639
    Abstract: Achievement of robust stability of a power amplifier (PA) that allows the sharing of the ground between the driver stages and the output stage is shown. A controlled amount of negative feedback is used to neutralize the local positive feedback that results from the driver-to-output stage ground sharing in the signal path, for example, a radio frequency (RF) signal path. The solution keeps a strong drive and a good performance of the PA. Exemplary embodiments are shown for the PA positive feedback neutralization. A first embodiment uses a ground signal divider while another embodiment uses a ground signal divider weighting technique.
    Type: Application
    Filed: December 2, 2011
    Publication date: June 7, 2012
    Applicant: AMALFI SEMICONDUCTOR, INC.
    Inventors: Baker Scott, George Maxim, Stephen Franck, Chu Hsiung Ho
  • Publication number: 20060252396
    Abstract: A phase generator includes at least one input port for accepting a reference signal having a frequency, a plurality of n output ports, n>4, and a network of phase-shifting elements coupled in a circularly-symmetrical configuration between the at least one input port and the output ports. The network of phase-shifting elements has a symmetry increment of 360/n degrees. The phase generator generates at the output ports respective polyphase signals at the frequency, the polyphase signals having respective phases that are consecutive integer multiples of 360/n degrees.
    Type: Application
    Filed: May 9, 2005
    Publication date: November 9, 2006
    Applicant: DSPG LTD.
    Inventors: Ilan Barak, Chu-Hsiung Ho