Patents by Inventor Kam C. Kwong

Kam C. Kwong 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: 8159620
    Abstract: A receiver can handle different types of reception signals, such as, for example, TV and FM-radio signals. In the receiver, a mixer (MIX) mixes a reception signal with an oscillator signal (OOS) so as to obtain a mixer output signal (MOS), which comprises a frequency-shifted version of the reception signal. An intermediate frequency amplifier (IFAMP) applies an amplified mixer output signal (MOSA) to two different intermediate frequency filters: one for first type reception signals and another for second type reception signals. A switchable coupling section (DBTP, SWA) is coupled between the mixer (MIX) and the intermediate frequency amplifier (IFAMP). The switchable coupling section (DBTP, SWA) is switchable to a first state and a second state. In the first state, the mixer output signal (MOS) substantially reaches an input (IAD) of the intermediate frequency amplifier (IFAMP) via a first coupling path (DTBP).
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: April 17, 2012
    Assignee: NXP B.V.
    Inventors: Yeow T. Toh, Kam C. Kwong
  • Patent number: 8155609
    Abstract: The present invention relates to a combination RF tuner capable of receiving signals from the FM radio band and from the TV band. Prior art combination tuners had to compromise in quality resulting in combination tuners that neither exhibited high-end FM nor TV-signal reception behavior. A combination RF tuner capable of optimal receiving an FM-radio signal type and a TV signal type, comprising a switch-able tuned input filter (440), is proposed. One response of the input filter (440) provides a sufficient big bandwidth for enabling reception of the TV-signal type. The input filter (440) of the invention can be switched, providing a second response that has a smaller bandwidth for enabling reception of the FM-radio signal type. The second response can be realized by substantially bypassing an 10 inductive element (450) (e.g., comprising a inductor, L21, in series with a damping resistor, R3) of the input filter (440).
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: April 10, 2012
    Assignee: NXP B.V.
    Inventors: Yeow T. Toh, Kam C. Kwong
  • Publication number: 20090215415
    Abstract: The present invention relates to a combination RF tuner capable of receiving signals from the FM radio band and from the TV band. Prior art combination tuners had to compromise in quality resulting in combination tuners that neither exhibited high-end FMnor TV-signal reception behavior. A combination RF tuner capable of optimal receiving an FM-radio signal type and a TV signal type, comprising a switch-able tuned input filter (440), is proposed. One response of the input filter (440) provides a sufficient big bandwidth for enabling reception of the TV-signal type. The input filter (440) of the invention can be switched, providing a second response that has a smaller bandwidth for enabling reception of the FM-radio signal type. The second response can be realized by substantially bypassing an 10 inductive element (450) (e.g., comprising a inductor, L21, in series with a damping resistor, R3) of the input filter (440).
    Type: Application
    Filed: September 2, 2005
    Publication date: August 27, 2009
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Yeow T. Toh, Kam C. Kwong
  • Publication number: 20090091663
    Abstract: A receiver can handle different types of reception signals, such as, for example, TV and FM-radio signals. In the receiver, a mixer (MIX) mixes a reception signal with an oscillator signal (OOS) so as to obtain a mixer output signal (MOS), which comprises a frequency-shifted version of the reception signal. An intermediate frequency amplifier (IFAMP) applies an amplified mixer output signal (MOSA) to two different intermediate frequency filters: one for first type reception signals and another for second type reception signals. A switchable coupling section (DBTP, SWA) is coupled between the mixer (MIX) and the intermediate frequency amplifier (IFAMP). The switchable coupling section (DBTP, SWA) is switchable to a first state and a second state. In the first state, the mixer output signal (MOS) substantially reaches an input (IAD) of the intermediate frequency amplifier (IFAMP) via a first coupling path (DTBP).
    Type: Application
    Filed: July 20, 2006
    Publication date: April 9, 2009
    Applicant: NXP B.V.
    Inventors: Yeow T. Toh, Kam C. Kwong
  • Patent number: 5101572
    Abstract: A displacement following device comprises a slider (1) mounted on a slideway (2) for movement along a linear displacement path. A beam (4) mounted on the slider (1) is rotatable about an axis of rotation (5) at its midpoint. A pair of stops (6, 7) spaced apart along the displacement path are fixed to the slideway (2) on opposite sides of the beam (4) and project into the path of movement of the beam. A tension spring (8) has one end connected (at 10) to the slider (1) and its other end connected to a point (9) between the axis of rotation (5) and one end of the beam. The spring (8) biases the beam (4) about its axis of rotation (5) into engagement with the stops (6, 7) so as to bias the slider (1) relative to the slideway (2) into a datum position from which the slider is bidirectionally displaceable along the displacement path.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: April 7, 1992
    Inventors: Kam H. Kwong, Kam C. Kwong