Patents by Inventor Börje Gustafsson

Börje Gustafsson 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).

  • Class d amplifier with pulse width modulation and a very low power consumption
    Patent number: 6191650
    Abstract: The invention concerns a class D amplifier in which a high-frequency reference signal is pulse width modulated by an input signal, such as an audio signal, and in which there are generated a pair of bipolar pulse drive signals, comprising an error generator which forms a signal with an average value which corresponds to the DC component of the pulse drive signals, and which is fed back to the pulse width modulator for the adjustment of the modulator. The high-frequency reference signal is generated from a first clock signal, and the individual pulses of the respective pulse drive signals are controlled via a second clock signal which is derived from the first clock signal.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: February 20, 2001
    Assignee: G/N Netcom A/S
    Inventors: Lars Backram, Hans-Erik Backram, Börje Gustafsson