Patents by Inventor Ron Hogervorst

Ron Hogervorst 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).

  • Frequency compensation of common-mode feedback loops for differential amplifiers
    Patent number: 6774722
    Abstract: Techniques for performing frequency compensation of common-mode feedback loops for differential amplifiers are disclosed.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: August 10, 2004
    Assignee: Centillium Communications, Inc.
    Inventor: Ron Hogervorst
  • Frequency compensation of common-mode feedback loops for differential amplifiers
    Publication number: 20040075502
    Abstract: Techniques for performing frequency compensation of common-mode feedback loops for differential amplifiers are disclosed.
    Type: Application
    Filed: October 16, 2002
    Publication date: April 22, 2004
    Inventor: Ron Hogervorst
  • Differential amplifier having rail-to-rail input capability and square-root current control
    Patent number: 5371474
    Abstract: A differential amplifier contains a pair of differential portions (10 and 12) that together provide representative signal amplification across the full amplifier power-supply voltage range. Each differential portion normally contains a pair of like-polarity differentially coupled FETs (Q1 and Q2, Q3 and Q4) that divide a tail current (I.sub.N, I.sub.P) into a pair of main currents (I.sub.1 and I.sub.2, I.sub.3 and I.sub.4). The two FET pairs are complementary. A square-root circuit (24) controls the tail currents in such a way that the sum of their square roots is largely constant. Consequently, the amplifier transconductance is largely constant.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: December 6, 1994
    Assignee: Philips Electronics North America Corporation
    Inventors: Roelof F. Wassenaar, Johan H. Huijsing, Remco J. Wiegerink, Ron Hogervorst, John P. Tero