Patents by Inventor Henk C. Nauta

Henk C. Nauta 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: 6084473
    Abstract: Variable gain amplifiers comprised of multiple variable gain stages, wherein the gain of the various stages is controlled by comparisons of a control voltage with various reference voltages, in the preferred embodiment generated by the use of a series connection of multiple resistors connected to a supply voltage. These relative comparisons control current ratios determining the gain of each variable gain amplifier stage. By staggering the changes in current ratios, an overall gain change with control voltage which is smooth in gain in dB versus control voltage in volts may be achieved, generally without requiring use of current sources which are proportional to absolute temperature. The sequence of control of the individual gain states as a function of the control voltage in the preferred embodiment is selected such that the best performance is obtained with respect to noise, signal handling capability and distortion at every setting of the total gain.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: July 4, 2000
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Henk C. Nauta, Frank A. A. Verwaal