Patents by Inventor Mark Allen Enderich

Mark Allen Enderich 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 sense circuit with offset calibration
    Patent number: 9696352
    Abstract: A switching device is controlled by a microprocessor to selectively configure the circuit between a current measurement mode and a calibration mode. When the switch is set to the “on” state, the circuit acts as a normal prior art circuit, with the output Vout being read by the microprocessor to determine the current to the load. However, when the switch is set to the “off” state, a small value resistor (which may be roughly three orders of magnitude greater than Rshunt) connects the inputs of the measuring circuit so that the circuit can generate an output Vout corresponding to the zero load current. By connecting the V+ and V? inputs together with a low resistance resistor, the no-load condition Vdiff=V+?V??0 applies. In this state, the no-load offset can be determined by measuring the output voltage of the circuit without turning off the load.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: July 4, 2017
    Assignee: Hella Corporate Center USA, Inc.
    Inventors: Alan Wayne Brown, Mark Allen Enderich, Stanley Smith
  • CURRENT SENSE CIRCUIT WITH OFFSET CALIBRATION
    Publication number: 20150022184
    Abstract: A switching device is controlled by a microprocessor to selectively configure the circuit between a current measurement mode and a calibration mode. When the switch is set to the “on” state, the circuit acts as a normal prior art circuit, with the output Vout being read by the microprocessor to determine the current to the load. However, when the switch is set to the “off” state, a small value resistor (which may be roughly three orders of magnitude greater than Rshunt) connects the inputs of the measuring circuit so that the circuit can generate an output Vout corresponding to the zero load current. By connecting the V+ and V? inputs together with a low resistance resistor, the no-load condition Vdiff=V+?V??0 applies. In this state, the no-load offset can be determined by measuring the output voltage of the circuit without turning off the load.
    Type: Application
    Filed: July 15, 2014
    Publication date: January 22, 2015
    Inventors: Alan Wayne Brown, Mark Allen Enderich, Stanley Smith