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:
Jun. 06, 1989
Filed:
Feb. 18, 1987
Richard E Jokela, Puyallup, WA (US);
Myo-Tronics Research, Inc., Seattle, WA (US);
Abstract
An improved analog preprocessor for a jaw tracking device having a plurality of magnetic sensors (44), each of which produces a first analog signal corresponding to the position of a magnet fixed with respect to the patient's mandible. The preprocessor includes analog means (200) for electrically combining the first analog signals to produce at least one analog position signal representing the position of the magnet along one axis, a gain select circuit (302) for providing a gain select signal, a variable slope ramp generator that provides a ramp signal having a slope corresponding to the gain select signal, a comparator for comparing the position and ramp signals and generating an output pulse having a length corresponding to the magnitude of the position signal, and a low pass filter for receiving the output pulse and producing an analog movement signal having a magnitude corresponding to the pulse length.