Patents by Inventor David Michael Alter

David Michael Alter 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).

  • Dynamic compensation of analog-to-digital converter (ADC) offset errors using filtered PWM
    Patent number: 7242330
    Abstract: A system and method of dynamic offset compensation that is particularly adaptable to analog-to-digital conversion performed in control applications employing highly integrated Digital Signal Processor (DSP) devices. The system providing dynamic compensation of Analog-to-Digital Converter (ADC) zero level offset errors includes an integrated DSP device with a multi-bit ADC and a PWM waveform generator for producing at least one PWM output, and an external low pass filter. The ADC receives an analog input signal and converts it into a corresponding digital output signal. The DSP device measures the zero level offset of the ADC output signal, and dynamically controls characteristics of the PWM output based on the measured offset. The low pass filter receives the PWM output and applies a corresponding controlled DC output voltage to the low reference voltage input of the ADC to dynamically compensate for the zero level offset error.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: July 10, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: David Michael Alter