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:
Jul. 04, 1995
Filed:
Jun. 24, 1992
Steven L Page, Dallas, TX (US);
Other;
Abstract
A speaker system includes a controller for driving a loudspeaker. The controller includes a sensor for detecting the present physical position of the speaker. The controller receives this position data as input, along with an audio signal to be reproduced. Using the audio signal as position data, the controller compares it with the actual sensed position data and generates an error signal. An error amplifier uses this error signal to drive the speaker, so that the speaker cone position matches the audio position defined in the audio data. In this manner, the speaker is driven by the error signal rather than the audio signal. In a preferred embodiment, the audio signal and position data are provided as digital signals, and the controller calculates the error signal in a digital signal processor.