Patents by Inventor Jeffrey S. Lehto

Jeffrey S. Lehto 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).

  • Current feedback amplifiers
    Patent number: 7358777
    Abstract: Current feedback amplifiers circuits that generate common mode (CM) and/or differential mode (DM) currents are provided herein. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures and the claims.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: April 15, 2008
    Assignee: Intersil Americas Inc.
    Inventor: Jeffrey S. Lehto
  • Current feedback amplifiers
    Patent number: 7250791
    Abstract: Current feedback amplifiers circuits that generate common mode (CM) and/or differential mode (DM) currents are provided herein. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures and the claims.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: July 31, 2007
    Assignee: Intersil Americas Inc.
    Inventor: Jeffrey S. Lehto
  • Common-mode current feedback amplifiers
    Patent number: 7132859
    Abstract: Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the benefits of CFA designs, such as high slew rate and bandwidth, with independent control of DM and CM signals. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures and the claims.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: November 7, 2006
    Assignee: Intersil Americas Inc.
    Inventor: Jeffrey S. Lehto
  • Differential-mode current feedback amplifiers
    Patent number: 7132860
    Abstract: Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the benefits of CFA designs, such as high slew rate and bandwidth, with independent control of DM and CM signals. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures and the claims.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: November 7, 2006
    Assignee: Intersil Americas Inc.
    Inventor: Jeffrey S. Lehto
  • Current feedback amplifiers with separate common-mode and differential-mode inputs
    Patent number: 7116132
    Abstract: Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the benefits of CFA designs, such as high slew rate and bandwidth, with independent control of DM and CM signals. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures and the claims.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: October 3, 2006
    Assignee: Intersil Americas Inc.
    Inventor: Jeffrey S. Lehto
  • Common-mode and differential-mode compensation for operational amplifier circuits
    Patent number: 6867649
    Abstract: An amplifier is configured to provide both common-mode and differential-mode compensation to ensure stability in telecommunications circuits or other circuits where both common mode and differential mode signal paths are provided. The amplifier includes two interconnected operational amplifiers AMPA and AMPB. Common mode compensation is provided by connecting one or more capacitors with a total value CCOMMON connected from a gain node at the input of an inverter in one of the amplifiers AMPA or AMPB to the output of the inverter in the other amplifier. Differential mode compensation can be provided by connecting a capacitor with value CCOMP at the gain node of each of the amplifiers AMPA or AMPB. Alternatively, both differential mode and Miller effect compensation can be provided by connecting one or more capacitors with total value CCOMP from the input to the output of components forming the inverter in each of the amplifiers AMPA and AMPB.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: March 15, 2005
    Assignee: Elantec Semiconductor, Inc.
    Inventor: Jeffrey S. Lehto
  • Common-mode and differential-mode compensation for operational amplifier circuits
    Publication number: 20040056715
    Abstract: An amplifier is configured to provide both common-mode and differential-mode compensation to ensure stability in telecommunications circuits or other circuits where both common mode and differential mode signal paths are provided. The amplifier includes two interconnected operational amplifiers AMPA and AMPB. Common mode compensation is provided by connecting one or more capacitors with a total value CCOMMON connected from a gain node at the input of an inverter in one of the amplifiers AMPA or AMPB to the output of the inverter in the other amplifier. Differential mode compensation can be provided by connecting a capacitor with value CCOMP at the gain node of each of the amplifiers AMPA or AMPB. Alternatively, both differential mode and Miller effect compensation can be provided by connecting one or more capacitors with total value CCOMP from the input to the output of components forming the inverter in each of the amplifiers AMPA and AMPB.
    Type: Application
    Filed: September 8, 2003
    Publication date: March 25, 2004
    Applicant: Elantec Semiconductor, Inc.
    Inventor: Jeffrey S. Lehto