Patents by Inventor Tung-Shan Chen

Tung-Shan Chen 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: 7843279
    Abstract: A low temperature coefficient oscillator including a current generator, a first and a second voltage generator, an amplifier, a resistor, a switch, a capacitor and an oscillating unit is provided. The current generator generates a first through a fourth current according to a control signal. The first voltage generator generates a first voltage according to the first current. The second voltage generator generates a second voltage according to the second current and a frequency signal. The amplifier generates the control signal according the first and second voltages. The resistor is coupled between a first terminal of the switch and ground, and a first terminal thereof receives the third current. The switch is conducted or not according the frequency signal. The capacitor is coupled between a second terminal of the switch and ground. The oscillating unit generates the frequency signal according to the fourth current and a voltage of the capacitor.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: November 30, 2010
    Assignee: ITE Tech, Inc.
    Inventors: Yi-Chung Chou, Tung-Shan Chen
  • Publication number: 20100171559
    Abstract: A low temperature coefficient oscillator including a current generator, a first and a second voltage generator, an amplifier, a resistor, a switch, a capacitor and an oscillating unit is provided. The current generator generates a first through a fourth current according to a control signal. The first voltage generator generates a first voltage according to the first current. The second voltage generator generates a second voltage according to the second current and a frequency signal. The amplifier generates the control signal according the first and second voltages. The resistor is coupled between a first terminal of the switch and ground, and a first terminal thereof receives the third current. The switch is conducted or not according the frequency signal. The capacitor is coupled between a second terminal of the switch and ground. The oscillating unit generates the frequency signal according to the fourth current and a voltage of the capacitor.
    Type: Application
    Filed: March 18, 2009
    Publication date: July 8, 2010
    Applicant: ITE TECH. INC.
    Inventors: Yi-Chung Chou, Tung-Shan Chen
  • Patent number: 6784727
    Abstract: A fast-setting DC offset removal circuit with continuous cutoff frequency switching is disclosed. In the preferred embodiment, the circuit is implemented using a pair of RC filters for receiving a differential signal pair and a continuous, variable resistance control circuit. The control circuit can be current-controlled or voltage controlled to provide fast settling of the received signal and the removal of the DC offset components. Additionally, by using a current-controlled control circuit, the cutoff frequency of the RC filter can be ramped from high to low in a continuous manner, thereby minimizing the generation of DC offsets.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: August 31, 2004
    Assignee: Hyperband Communication, Inc.
    Inventors: Kanyu Cao, Tung-Shan Chen, Hongyu Li, Chieh-Yuan Chao