Patents by Inventor Herbert Pichlik

Herbert Pichlik 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 high resolution analog/digital converter circuit
    Patent number: 4999624
    Abstract: An analog-to-digital conversion circuit is provided with an analog subtractor having a subtract input coupled to the output of a digital-to-analog converter. An analog-to-digital converter is connected to the output of the analog subtractor. The A/D conversion circuit also includes a control device and a device for error correction coupled to the output of the A/D converter. The circuit aims to provide a higher resolution in two conversion steps and with reduced conversion times. The analog subtractor therefore comprises at least two differential amplifiers and one analog multiplexer with the outputs of the differential amplifiers connected to inputs of the analog multiplexer. A control input of the analog multiplexer is coupled to the control device.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: March 12, 1991
    Assignee: U.S. Philips Corporation
    Inventor: Herbert Pichlik