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:
Oct. 24, 2006
Filed:
Apr. 22, 2002
Lothar Blossfeld, Breitnau, DE;
Lothar Blossfeld, Breitnau, DE;
Micronas GmbH, Freiburg, DE;
Abstract
To measure a physical parameter, a two-wire sensor produces pulse-width modulated signals (PWM) whose pulse width is preferably modulated as a function of the physical parameter to be measured. To indicate an error or a malfunction, the two-wire sensor provides an error signal with a specifiable pulse-width ratio that is preferably 1:1, while asymmetric pulse-width ratios are provided for the measurement signals (PWM). To measure a physical parameter that assumes only one of two states or values, the two-wire sensor produces a first measurement signal with a specifiable asymmetric pulse-width ratio and a second measurement signal formed by inversion of the first measurement signal. A plurality of two-wire sensors can for example be connected to a common two-wire line and operated in time-multiplex mode.