Patents by Inventor Guoyong GUO
Guoyong GUO 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: 9660473Abstract: A DC/DC converter converts an input DC voltage to an output DC voltage and charges a battery. The DC/DC converter includes: a DC/DC controller, operable for generating a driving signal according to a target value for the output voltage and a first detection signal indicative of the output voltage level to control switching circuitry and to adjust the output voltage level; and a battery charging controller, coupled to the DC/DC controller and the battery, that is operable for receiving the first detection signal indicative of the output voltage level and a second detection signal indicative of a battery voltage level, and for generating a loop control signal according to the first detection signal and the second detection signal to adjust the target value for the output voltage, wherein the difference between the first detection signal and the second detection signal indicates the amount of a battery charging current.Type: GrantFiled: November 17, 2014Date of Patent: May 23, 2017Assignee: O2Micro IncInventors: Gang Li, Guoyong Guo, Laszlo Lipcsei
-
Patent number: 9647556Abstract: In a controller for a DC to DC converter, PWM signal generating circuitry generates a set of PWM signals phase-shifted relative to one another, and controls states of the PWM signals according to a set of control signals. Each PWM signal of the PWM signals has an on-time state and an off-time state. Ramp signal generating circuitry, coupled to the PWM signal generating circuitry, generates a set of ramp signals having substantially the same ramp slope. Each ramp signal of the ramp signals is generated in response to detecting an on-time state of a corresponding PWM signal of the PWM signals. Additionally, a comparing circuit, coupled to the PWM and ramp signal generating circuitry, alternately compares the ramp signals with a preset reference to generate the control signals. A corresponding control signal of the control signals changes the corresponding PWM signal from the on-time state to an off-time state.Type: GrantFiled: July 8, 2014Date of Patent: May 9, 2017Assignee: O2Micro, Inc.Inventors: Gang Li, Fengjiang Zhang, Guoyong Guo
-
Publication number: 20160365805Abstract: In a power transfer system, a first main switch can transfer power from a first connector to an output terminal. A first path can deliver a current from the first connector to the output terminal and control the current to be within a predefined ranger. A second main switch can transfer power from a second connector to the output terminal. A second path can deliver a current from the second connector to the output terminal and control the current to be within a predefined range. Control circuitry can turn off the second main switch and the second path and turn on the first path if the first power source is available at the first connector when the second power source is providing power to the output terminal. The control circuitry can turn on the first main switch when a time interval from turning on the first path has elapsed.Type: ApplicationFiled: June 9, 2015Publication date: December 15, 2016Inventors: Guoyong GUO, Shiqiang YANG, Zhanpeng YANG
-
Publication number: 20160141892Abstract: A DC/DC converter converts an input DC voltage to an output DC voltage and charges a battery. The DC/DC converter includes: a DC/DC controller, operable for generating a driving signal according to a target value for the output voltage and a first detection signal indicative of the output voltage level to control switching circuitry and to adjust the output voltage level; and a battery charging controller, coupled to the DC/DC controller and the battery, that is operable for receiving the first detection signal indicative of the output voltage level and a second detection signal indicative of a battery voltage level, and for generating a loop control signal according to the first detection signal and the second detection signal to adjust the target value for the output voltage, wherein the difference between the first detection signal and the second detection signal indicates the amount of a battery charging current.Type: ApplicationFiled: November 17, 2014Publication date: May 19, 2016Inventors: Gang LI, Guoyong GUO, Laszlo LIPCSEI
-
Publication number: 20160013713Abstract: In a controller for a DC to DC converter, PWM signal generating circuitry generates a set of PWM signals phase-shifted relative to one another, and controls states of the PWM signals according to a set of control signals. Each PWM signal of the PWM signals has an on-time state and an off-time state. Ramp signal generating circuitry, coupled to the PWM signal generating circuitry, generates a set of ramp signals having substantially the same ramp slope. Each ramp signal of the ramp signals is generated in response to detecting an on-time state of a corresponding PWM signal of the PWM signals. Additionally, a comparing circuit, coupled to the PWM and ramp signal generating circuitry, alternately compares the ramp signals with a preset reference to generate the control signals. A corresponding control signal of the control signals changes the corresponding PWM signal from the on-time state to an off-time state.Type: ApplicationFiled: July 8, 2014Publication date: January 14, 2016Inventors: Gang LI, Fengjiang ZHANG, Guoyong GUO
-
Publication number: 20150373785Abstract: A fixing member, a cooking range and an oven with the same are provided. The fixing member includes: a base plate defining a mounting hole; a connecting plate comprising a first plate segment connected at a first side of the base plate, a second plate segment, and a third plate segment substantially parallel to the base plate, the second plate segment being connected between the first and third plate segments; and a fixing plate defining a first end connected at a second side of the base plate and perpendicular to the base plate, and a second end having a snapping tongue bent and extended in a direction away from the connecting plate, a vertical distance between a free end of the snapping tongue and the base plate being equal to or greater than that between the third plate segment and the base plate.Type: ApplicationFiled: June 10, 2015Publication date: December 24, 2015Inventors: Bingsheng LI, Yonglin DING, Guoyong GUO
-
Patent number: 9106134Abstract: A power transfer device includes an input terminal, an output terminal, a control unit, and a drive unit. The input terminal can receive an input voltage. The output terminal can provide an output voltage. The control unit can control a switch between the input and output terminals to adjust the output voltage according to the input voltage and a reference voltage, wherein said control unit is deactivated if the reference voltage reaches the input voltage. The drive unit can connect the control unit and the switch if the control unit is activated, and can maintain the output voltage at or near the input voltage if the control unit is deactivated.Type: GrantFiled: June 21, 2013Date of Patent: August 11, 2015Assignee: O2Micro, Inc.Inventors: Guoyong Guo, Laszlo Lipcsei
-
Patent number: 9083237Abstract: A converter circuit includes a converter and a controller. The converter converts an input voltage to an output voltage. The controller receives a reference voltage, generates a slew voltage having a substantially constant first slew rate if the reference voltage changes from a first level to a second level, and controls the converter based on the slew voltage to cause the output voltage to change from a third level to a fourth level at a substantially constant second slew rate.Type: GrantFiled: June 22, 2011Date of Patent: July 14, 2015Assignee: O2Micro, Inc.Inventors: Serban Mihai Popescu, Laszlo Lipcsei, Marius Padure, Guoyong Guo
-
Publication number: 20140375284Abstract: A power transfer device includes an input terminal, an output terminal, a control unit, and a drive unit. The input terminal can receive an input voltage. The output terminal can provide an output voltage. The control unit can control a switch between the input and output terminals to adjust the output voltage according to the input voltage and a reference voltage, wherein said control unit is deactivated if the reference voltage reaches the input voltage. The drive unit can connect the control unit and the switch if the control unit is activated, and can maintain the output voltage at or near the input voltage if the control unit is deactivated.Type: ApplicationFiled: June 21, 2013Publication date: December 25, 2014Inventors: Guoyong GUO, Laszio LIPCSEI
-
Publication number: 20140300326Abstract: A circuit in an electronic device coupled to a battery via a first pair of switches includes a logic unit and a filter. The logic unit receives a pulse width modulation (PWM) signal and a first signal, and generates a second signal according to the PWM signal and the first signal. The filter is coupled to the logic unit and converts the PWM signal into a first voltage under the control of the second signal. When the first voltage is at a voltage of the battery and a duty cycle of the PWM signal is at a specified value, the first pair of switches controls power to the battery under control of the PWM signal and the circuit is disabled by the first signal.Type: ApplicationFiled: July 2, 2013Publication date: October 9, 2014Inventors: Shiqiang YANG, Guoyong GUO
-
Patent number: 8629649Abstract: A flexible dual mode battery charger that charges a battery in two different modes, depending on the difference between the adapter voltage and the battery voltage, with a smooth transition between these two modes and the charging current remains relatively constant during the transition is provided in this application. At a lower battery level, the dual mode battery charger charges the battery as a LDO charger and when battery voltage is very close to the adapter voltage, the charger migrates its operating mode from the LDO mode to the boost mode and charges the battery as a boost charger. This flexible battery charger uses one common control circuit for controlling the operations of the LDO charger and the boost charger. The switching operation from one operation mode to other operation mode is smooth.Type: GrantFiled: July 14, 2011Date of Patent: January 14, 2014Assignee: O2Micro International, Ltd.Inventors: Guoyong Guo, Dan Nie
-
Patent number: 8415997Abstract: A signal synchronizing system includes comparison circuitry and control circuitry. The comparison circuitry compares a synchronizing signal with an input signal to generate a comparison result. The control circuitry adjusts the synchronizing signal into a range that is determined by the input signal, and controls the range according to the comparison result.Type: GrantFiled: June 10, 2011Date of Patent: April 9, 2013Assignee: 02Micro Inc.Inventors: Ye Li, Gang Li, Guoyong Guo
-
Publication number: 20130015810Abstract: A flexible dual mode battery charger that charges a battery in two different modes, depending on the difference between the adapter voltage and the battery voltage, with a smooth transition between these two modes and the charging current remains relatively constant during the transition is provided in this application. At a lower battery level, the dual mode battery charger charges the battery as a LDO charger and when battery voltage is very close to the adapter voltage, the charger migrates its operating mode from the LDO mode to the boost mode and charges the battery as a boost charger. This flexible battery charger uses one common control circuit for controlling the operations of the LDO charger and the boost charger. The switching operation from one operation mode to other operation mode is smooth.Type: ApplicationFiled: July 14, 2011Publication date: January 17, 2013Applicant: O2MICRO, INC.Inventors: Guoyong Guo, Dan Nie
-
Publication number: 20120313681Abstract: A signal synchronizing system includes comparison circuitry and control circuitry. The comparison circuitry compares a synchronizing signal with an input signal to generate a comparison result. The control circuitry adjusts the synchronizing signal into a range that is determined by the input signal, and controls the range according to the comparison result.Type: ApplicationFiled: June 10, 2011Publication date: December 13, 2012Inventors: Ye LI, Gang LI, Guoyong GUO
-
Publication number: 20120013315Abstract: A converter circuit includes a converter and a controller. The converter converts an input voltage to an output voltage. The controller receives a reference voltage, generates a slew voltage having a substantially constant first slew rate if the reference voltage changes from a first level to a second level, and controls the converter based on the slew voltage to cause the output voltage to change from a third level to a fourth level at a substantially constant second slew rate.Type: ApplicationFiled: June 22, 2011Publication date: January 19, 2012Inventors: Serban Mihai POPESCU, Laszlo LIPCSEI, Marius PADURE, Guoyong GUO