The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2017
Filed:
Jul. 15, 2014
Hella Corporate Center Usa, Inc., Plymouth, MI (US);
Alan Wayne Brown, Canton, MI (US);
Mark Allen Enderich, Riverview, MI (US);
Stanley Smith, Troy, MI (US);
Hella Corporate Center USA, Inc., Plymouth, MI (US);
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 Vbeing 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 R) connects the inputs of the measuring circuit so that the circuit can generate an output Vcorresponding to the zero load current. By connecting the Vand Vinputs together with a low resistance resistor, the no-load condition V=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.