Patents by Inventor Per Lindman

Per Lindman 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).

  • Power supply with dynamic input current suppression
    Patent number: 8810215
    Abstract: A power supply is described, which comprises a first stage DC-to-DC voltage conversion block and a second stage voltage conversion block having a feedback circuit to regulate the output voltage (Vout) thereof so as to reduce changes in the output voltage as the output current (Iout) drawn by a load changes. The power supply also includes a capacitor connected between the first and second stage voltage conversion blocks to supply current to the second stage voltage conversion block when the input voltage (Vint) to the second stage voltage conversion block changes due to changes in output current (Iout) of the second stage voltage conversion block. The first stage voltage conversion block comprises a feedback circuit to regulate the output voltage of the first stage voltage conversion block.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: August 19, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Johan Hörman, Per Lindman
  • POWER SUPPLY WITH DYNAMIC INPUT CURRENT SUPPRESSION
    Publication number: 20120105028
    Abstract: A power supply is described, which comprises a first stage DC-to-DC voltage conversion block, and a second stage voltage conversion block having a feedback circuit to regulate the output voltage (Vout) thereof so as to reduce changes in the output voltage as the output current (Iout) drawn by a load changes. The power supply also includes a capacitor connected between the first and second stage voltage conversion blocks to supply current to the second stage voltage conversion block when the input voltage (Vint) to the second stage voltage conversion block changes due to changes in output current (Iout) of the second stage voltage conversion block. The first stage voltage conversion block comprises a feedback circuit to regulate the output voltage of the first stage voltage conversion block.
    Type: Application
    Filed: April 28, 2010
    Publication date: May 3, 2012
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Johan Hörman, Per Lindman
  • Circuit for improved load transient response in power supplies
    Patent number: 6040639
    Abstract: An apparatus contains a main electrical supply and an additional electrical supply for supplying additional electrical current in response to a change in an output load supplied by the main electrical supply. A differential measuring device senses a change in the load, or output of the main supply, and provides an indication to the additional electrical supply to supply additional current to the load. The additional electric supply contains a capacitor connected to a voltage source having a higher voltage output than the main electrical supply, and a current generator.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: March 21, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Thomas Ginell, Lars Thorsell, Per Lindman