Patents by Inventor Alfred Caspers

Alfred Caspers 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).

  • Communication device and a method for simultaneous transmission of speech and data
    Patent number: 6507730
    Abstract: A communication device (100) including a receiver (110), a demodulator (120), a frequency dependent LF amplifier (130) as well as a frequency dependent decoder (150) receives a HF signal (105) onto which speech information and data information are modulated on a single carrier. The LF signal (125) provided from demodulator (120) includes two separated frequency bands for speech and data. The amplifier (130) makes audible the speech via a speaker (140) and the decoder (150) evaluates the data information, displays the same at a display (160) and controls the amplifier (150,155), respectively.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: January 14, 2003
    Assignee: Motorola, Inc.
    Inventors: Alfred Caspers, Norbert Roettger
  • Frequency generator for generating two independent FSK signals
    Patent number: 6163229
    Abstract: A frequency generating circuit scales a warp range of a frequency signal. The frequency generating circuit includes a first frequency signal (10) having a first offset signal with a first frequency relationship to the first frequency signal, and a second frequency signal (14). A frequency scaling element (16) receives the first frequency signal (10) and second frequency signal and provides a third frequency signal, such that the third frequency signal includes the first offset signal having a second frequency relationship to the third signal. A switch (54), has a control input (74), a first input for receiving the first frequency signal, a second input operably coupled to the frequency scaling element (16, 42) for receiving the third frequency signal and an output (76) operably coupled to the first input or the second input dependent upon a control signal applied to the control input (74).
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: December 19, 2000
    Assignee: Motorola, Inc.
    Inventors: Alfred Caspers, Manfred Mueller, Stefan Lichterfeld, Norbert Roettger
  • Transmitter circuit and method of operation
    Patent number: 5978661
    Abstract: A transmitter circuit including an oscillator circuit (30) having at least one input for receiving at least one modulation signal and an output (32) for providing a modulated signal. A modulation circuit (13) is operably coupled to the at least one input of the oscillator circuit (30) for providing the at least one modulation signal and a feedback path (34) between the oscillator circuit (30) and the modulation circuit (13) provides a representation of the modulated signal output from the oscillator circuit (30) to the modulation circuit (13). In response to the modulated signal, the modulation circuit (13) automatically adjusts an amplitude level of the modulation signal.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: November 2, 1999
    Assignee: Motorola, Inc.
    Inventors: Alfred Caspers, Norbert Roettger