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. 13, 1995
Filed:
Sep. 10, 1993
Rainer Bitzer, Weil Der Stadt, DE;
Bernd Dittmer, Ludwigsburg, DE;
Franz Schwarz, Vaihingen, DE;
Karl-Heinz Haegele, Vaihingen, DE;
Thomas Wieja, Eningen, DE;
Helmut Schneider, Mutlangen, DE;
Robert Bosch G.m.b.H., Stuttgart, DE;
Abstract
The analyzer circuit includes a first oscillator producing an output signal having a first frequency depending on an inductance of an inductive position sensor having two oscillator coils positioned near a movable part; a switching device in the first oscillator for alternatingly connecting one of the two coils and simultaneously disconnecting the other according to a state of the switching device; a frequency divider for converting the output signal at the first frequency to another output signal at another frequency; a counter for counting a pulse signal under control of the other output signal of the frequency divider; a second oscillator connected to the counter and providing input pulses at a fixed frequency to the counter, which counts the input pulses under control of the other output signal of the frequency divider; a start synchronizing circuit for starting and synchronizing the divider and the counter; a flip-flop connected to the frequency divider and to the switching device to switch the state of the switching device; and an arithmetic-logic unit connected to the counter to receive a count from it and having a device for generating a digital output signal characteristic of a position of the movable part relative to the oscillator coils according to the count.