Patents by Inventor Crist Lu

Crist Lu 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: 11636834
    Abstract: An apparatus for hands-free turning of sheets in a booklet. A paper clip is attached to sheet(s) in the booklet. The apparatus comprises a swing arm with a magnet for magnetically attaching to the paper clip on the sheet(s). The swing arm sweeps from right-to-left with the sheet attached thereto, thereby turning the sheet over to the back page. This can be operated by a hands-free actuator, such as a foot pedal. The swing arm then makes a return stroke to turn the next sheet. Also disclosed are methods for turning pages in a hands-free manner.
    Type: Grant
    Filed: June 11, 2021
    Date of Patent: April 25, 2023
    Inventor: Crist Lu
  • Publication number: 20220254322
    Abstract: An apparatus for hands-free turning of sheets in a booklet. A paper clip is attached to sheet(s) in the booklet. The apparatus comprises a swing arm with a magnet for magnetically attaching to the paper clip on the sheet(s). The swing arm sweeps from right-to-left with the sheet attached thereto, thereby turning the sheet over to the back page. This can be operated by a hands-free actuator, such as a foot pedal. The swing arm then makes a return stroke to turn the next sheet. Also disclosed are methods for turning pages in a hands-free manner.
    Type: Application
    Filed: June 11, 2021
    Publication date: August 11, 2022
    Inventor: Crist Lu
  • Patent number: 9528884
    Abstract: In one embodiment, a circuit includes at least one transistor with a base and collector being electrically connected to a ground, and at least one current source being configured to apply four different currents (A, B, C, and D) to the emitter. A sum of the currents A and C are substantially equivalent to a sum of the currents B and D, or a sum of the currents A and D are substantially equivalent to a sum of the currents B and C. The circuit outputs first, second, third, and fourth voltage potentials between the emitter and the base during application of the currents A, B, C, and D, respectively.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: December 27, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Christoph Lang, Crist Lu
  • Publication number: 20150372674
    Abstract: In one embodiment, a circuit includes at least one transistor with a base and collector being electrically connected to a ground, and at least one current source being configured to apply four different currents (A, B, C, and D) to the emitter. A sum of the currents A and C are substantially equivalent to a sum of the currents B and D, or a sum of the currents A and D are substantially equivalent to a sum of the currents B and C. The circuit outputs first, second, third, and fourth voltage potentials between the emitter and the base during application of the currents A, B, C, and D, respectively.
    Type: Application
    Filed: February 5, 2014
    Publication date: December 24, 2015
    Inventors: Christoph Lang, Crist Lu
  • Patent number: 8878597
    Abstract: In one embodiment, a circuit includes at least one transistor with a base and collector being electrically connected to a ground, and at least one current source being configured to apply four different currents (A, B, C, and D) to the emitter. A sum of the currents A and C are substantially equivalent to a sum of the currents B and D, or a sum of the currents A and D are substantially equivalent to a sum of the currents B and C. The circuit outputs first, second, third, and fourth voltage potentials between the emitter and the base during application of the currents A, B, C, and D, respectively.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: November 4, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Christoph Lang, Crist Lu
  • Publication number: 20140232450
    Abstract: In one embodiment, a circuit includes at least one transistor with a base and collector being electrically connected to a ground, and at least one current source being configured to apply four different currents (A, B, C, and D) to the emitter. A sum of the currents A and C are substantially equivalent to a sum of the currents B and D, or a sum of the currents A and D are substantially equivalent to a sum of the currents B and C. The circuit outputs first, second, third, and fourth voltage potentials between the emitter and the base during application of the currents A, B, C, and D, respectively.
    Type: Application
    Filed: February 15, 2013
    Publication date: August 21, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventors: Christoph Lang, Crist Lu
  • Patent number: 8149151
    Abstract: A sensor system for generating sample analog signals for processing by a signal processing circuit that utilizes non-constant weights includes a plurality of signal generating elements and a switching network having a plurality of switches operably coupled to the plurality of signal generating elements. The switching network is configured to switch the plurality of signal generating elements between a plurality of different configurations. The system includes a dynamic element matching (DEM) control system for controlling the switch network to implement a second order DEM rotation scheme in which the plurality of signal generating elements are switched to each configuration in the plurality of configurations in a first sequence and then switched to each configuration in the plurality in a second sequence, the second sequence being the reverse of the first sequence.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: April 3, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Johan Peter Vanderhaegen, Christoph Lang, Crist Lu
  • Publication number: 20100073349
    Abstract: An image display system implemented with a spatial light modulator (SLM) comprising a plurality of pixel elements each comprises a driver circuit. The driver circuit further comprises at least a first and second transistors cascaded with a first capacitor between a high voltage (Vh) and a ground voltage (Vg) wherein each of the first and second transistors having a breakdown voltage less than the high voltage (Vh). The first transistor receives an input signal to turn on the first and second transistors for discharging the first capacitor and pulling down an output voltage to a ground voltage (Vg) and to turn off the first and second transistors to pull up the output voltage to the high voltage (Vh) wherein each of the first and second transistor is biased to approximately half of the high voltage (Vh/2).
    Type: Application
    Filed: November 19, 2009
    Publication date: March 25, 2010
    Inventors: Fusao Ishii, Crist Lu
  • Patent number: 7545228
    Abstract: A method for generating a temperature-compensated timing signal that includes counting, within an update interval, a first number of oscillations of a first micro-electromechanical (MEMS) resonator, a second number of oscillations of a second MEMS resonator and a third number of oscillations of a digitally controlled oscillator (DCO), computing a target DCO count based on the first number and second number of oscillations, computing a loop error signal based on the target DCO count and the third number of oscillations, and modifying an output frequency of a temperature-dependent (DCO) timing signal based on the loop error signal. The duration of the update interval may also be modified based on temperature conditions, and the update interval may also be interrupted and the output frequency immediately adjusted, if a significant temperature change is detected. Thus, dynamic and precise temperature compensation is achieved that accommodates constant, slowly changing, and rapidly changing temperature conditions.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: June 9, 2009
    Assignee: SiTime Inc.
    Inventors: Crist Lu, Erno Klaassen, Sathi Perumal
  • Publication number: 20070257728
    Abstract: Embodiments of an oscillator circuit are described. Embodiments described herein include an oscillator circuit suitable for a resonator with relatively high motional impedance, thus requiring relatively high amplification and having relatively high sensitivity to noise. However, the embodiments described are not intended to be limited to use with any particular type of resonator. In one embodiment, alternating current (AC) coupling, or capacitive coupling, is used in part to decouple the bias voltage placed on the resonator from the operating point of the amplifier, allowing one voltage to be high relative to the other. In an embodiment, some legs, or all legs of the circuit that includes drive circuitry and a resonator include differential signaling.
    Type: Application
    Filed: May 3, 2006
    Publication date: November 8, 2007
    Inventors: Bernhard Boser, Crist Lu, Aaron Partridge