Patents by Inventor Christopher M. Chorey

Christopher M. Chorey 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: 6304748
    Abstract: A cellular phone for a mobile communications system includes a dual band transmitter which operates at a first radio frequency band and a second radio frequency band. The dual band transmitter includes two amplifiers. The first amplifier has a first input for a first signal at the first radio frequency band, and a first output for an amplified first signal. The first output is connectable to the antenna via a first signal path. The second amplifier has a second input for a second signal at the second radio frequency band and a second output for an amplified second signal. The second output is connectable to the antenna via a second signal path. A filter module is associated with the first and second signal paths and configured to receive a control signal which controls the filter module to have one of a first and second cut-off frequencies.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: October 16, 2001
    Assignee: Conexant Systems, Inc.
    Inventors: Leo L. Li, Christopher M. Chorey
  • Patent number: 6163709
    Abstract: A transmitter for a cellular phone comprising an antenna and being operable at a first radio frequency band and a second radio frequency band is disclosed. In one embodiment, the transmitter includes a first power amplifier and a second power amplifier. The first power amplifier has a first input for a first signal at the first radio frequency band and a first output for an amplified first signal, the first output being connected to the antenna. The second power amplifier has a second input for a second signal at the second radio frequency band and a second output for an amplified second signal, the second output being connected to the antenna. The transmitter further comprises a single control module which is associated with the first and second outputs of the power amplifiers and comprises a logarithmic detector. The control module generates a control signal which is a function of an amplified signal and a reference signal in order to control the two power amplifiers.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: December 19, 2000
    Assignee: Conexant Systems, Inc.
    Inventors: Christopher M. Chorey, Iconomos A. Koullias, Luke T. Steigerwald
  • Patent number: 6154664
    Abstract: A transmitter for a cellular phone comprising an antenna and being operable at a first radio frequency band and a second radio frequency band is disclosed. The transmitter comprises a first power amplifier and a second power amplifier, one of which is active at a time. The first power amplifier has an input for a first signal at the first radio frequency band, an input for a first control signal and a first output for an amplified first signal. The first output is connectable to the antenna. The second power amplifier has an input for a second signal at the second radio frequency band, an input for a second control signal and a second output for an amplified second signal. The second output is connectable to the antenna. The transmitter further comprises a single control module associated with the first and second outputs of the power amplifiers. The control module generates a control signal for the active power amplifier.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: November 28, 2000
    Assignee: Conexant System, Inc.
    Inventors: Christopher M. Chorey, Iconomos A. Koullias, Luke T. Steigerwald
  • Patent number: 6151509
    Abstract: A transmitter for a cellular phone comprising an antenna and being operable at a first radio frequency band and a second radio frequency band is disclosed. The transmitter comprises a first power amplifier and a second power amplifier. The first power amplifier has a first input for a first signal at the first radio frequency band, a second input for a first control signal and a first output for an amplified first signal. The first output is connectable to the antenna. The second power amplifier has a third input for a second signal at the second radio frequency band, a fourth input for a second control signal and a second output for an amplified second signal. The second output is connectable to the antenna. The transmitter further comprises a single control module which receives a signal indicative of a current an active power amplifier draws. The control module uses this signal indicating the drawn current to generate a control signal to control the active power amplifier.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: November 21, 2000
    Assignee: Conexant Systems, Inc.
    Inventor: Christopher M. Chorey