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:
Jan. 30, 1996
Filed:
Jan. 25, 1995
Peter G Hancock, Plano, TX (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A magnetic detection circuit is provided which creates a reference signal that varies with temperature in a manner that is generally identical to the temperature induced variation of a Hall element. By providing a temperature sensitive reference signal, the Hall output signal can be compared to the reference signal without errors being induced by temperature change. One embodiment of the present invention provides a first resistor connected in parallel with the diode which, in turn, is connected between a Hall cell and a point of ground potential. Another embodiment of the present invention comprises a second resistor that is connected in series with the first resistor and in parallel with the Hall cell. Another embodiment of the present invention also incorporates a temperature sensitive resistor that is made of the same material as the Hall cell and used in conjunction with a trimmable resistor to provide inputs to an operational amplifier.