Patents by Inventor Iain Christopher Butler

Iain Christopher Butler 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).

  • High-speed low-power dynamic current biased operational amplifier
    Patent number: 7071778
    Abstract: A high-speed low-power dynamic current biased operational amplifier (Op-amp) for use in switched capacitor circuits. The system and method reduces current in the reset process of the switched capacitor circuit's operation, while maintaining the drive current required for fast settling in the amplification process. The system and method significantly lowers the power consumption of the switched capacitor circuit, while overcoming the main issues related to dynamic current biasing in an Op-amp, common-mode feedback interaction, using architecture other than the standard differential input stage of a normal Op-amp.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: July 4, 2006
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventor: Iain Christopher Butler
  • High-speed low-power dynamic current biased operational amplifier
    Publication number: 20040212431
    Abstract: A high-speed low-power dynamic current biased operational amplifier (Op-amp) for use in switched capacitor circuits. The system and method reduces current in the reset process of the switched capacitor circuit's operation, while maintaining the drive current required for fast settling in the amplification process. The system and method significantly lowers the power consumption of the switched capacitor circuit, while overcoming the main issues related to dynamic current biasing in an Op-amp, common-mode feedback interaction, using architecture other than the standard differential input stage of a normal Op-amp.
    Type: Application
    Filed: March 18, 2004
    Publication date: October 28, 2004
    Applicant: Sony Corporation and Sony Electronics Inc.
    Inventor: Iain Christopher Butler