Patents by Inventor Jurgen Grassle

Jurgen Grassle 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: 6265942
    Abstract: A gain-controlled amplifier with high dynamic range, useful in particular for frequencies in the GHz range, according to the invention comprises a bipolar or FET transistor (1) with an adaptive controlled feedback network (2) which may consist of one or a plurality of series connected diode(s) preferably PIN-diode(s). The transistor (1) and the controlling network (2, 3) can be operated at low voltages and current levels. Even for an operating frequency of 1 GHz and above, a gain control range of more than 20 dB can be obtained. Due to the feedback structure the linearity is enhanced especially for low gain values, and the controlled feedback does not degrade the noise figure. If used in an AGC loop circuit, the circuit current is increased for high input levels. Therefore the proposed circuit is suitable for battery powered receivers having input stages with automatic gain control.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: July 24, 2001
    Assignee: Sony International (Europe) GmbH
    Inventor: Jürgen Grässle
  • Patent number: 6239659
    Abstract: A gain-controlled amplifier with a high dynamic range, useful in particular for frequencies in the GHz range, according to the invention comprises a bipolar or FET transistor (1) with an adaptive controlled feedback network (2) which may consist of one or a plurality of series connected diode(s) preferably PIN-diode(s). The transistor (1) and the controlling network (2, 3) can be operated at low voltages and current levels. Even for an operating frequency of 1 GHz and above, a gain control range of more than 20 dB can be obtained. Due to the feedback structure the linearity is enhanced especially for low gain values, and the controlled feedback does not degrade the noise figure. If used in an AGC loop circuit, the circuit current is increased for high input levels. Therefore the proposed circuit is suitable for battery powered receivers having input stages with automatic gain control.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: May 29, 2001
    Assignee: Sony International (Europe) GmbH
    Inventor: Jürgen Grässle
  • Patent number: 6134267
    Abstract: A DAB stream starts with a so-called null symbol for the receiver synchronization carrying a transmitter identification information, i.e. TII, signal. Each transmitter in the single frequency network is assigned a main id and a sub id for unique identification. This identification is mapped to a certain pattern with 16/8/4/2 set carrier pairs in the spectrum of the null symbol according to the DAB modes I-IV. Based on mode II which has 384 valid carriers a so called comb block is defined. For modes I and IV this block is repeated 4 and 2 times, respectively. For mode III only a half block is available. This pattern is transmitted every 2nd DAB frame in the null symbol.To detect the set carriers the steps of differential demodulation of TII pairs included in the spectrum (S.sub.1 (.omega.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: October 17, 2000
    Assignee: Sony International (Europe) GmbH
    Inventors: Wolfgang Schafer, Jurgen Grassle, Markus Zumkeller