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. 30, 2009
Filed:
Sep. 06, 2005
Torsten Gollewski, Lenting, DE;
Robert Lange, Lennestadt, DE;
Thorsten Ringbeck, Siegen, DE;
Holger Heβ, Siegen, DE;
Bernd Buxbaum, Westerburg, DE;
Torsten Gollewski, Lenting, DE;
Robert Lange, Lennestadt, DE;
Thorsten Ringbeck, Siegen, DE;
Holger Heβ, Siegen, DE;
Bernd Buxbaum, Westerburg, DE;
PMD Technologies GmbH, Siegen, DE;
Abstract
A method and device for detecting the amplitude and/or the phase position of an intensity-modulated signal, including the following: detecting an instant value of the intensity-modulated signal and of a first reference signal with a frequency differing from the intensity-modulated signal; mixing the first reference signal with the intensity-modulated signal to obtain a mixed-signal value; detecting an instant value of a second reference signal with a frequency differing from both the previously detected signals and of a third reference signal of the same frequency but phase-shifted from the second reference signal; mixing the mixed-signal value with the second reference signal to yield a first measurement value; mixing the mixed-signal value with the third reference signal to yield a second measurement signal value; and calculating the amplitude and/or phase position from the two measurement signal values.