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:
Jan. 08, 2019
Filed:
Dec. 21, 2016
Sennheiser Electronic Gmbh & Co. KG, Wedemark, DE;
Axel Grell, Burgdorf, DE;
Manfred Hibbing, Wedemark, DE;
Sennheiser electronic GmbH & Co. KG, Wedemark, DE;
Abstract
A headphone unit comprising a headphone, a headphone pre-amplifier for pre-amplification of an audio signal to be reproduced, and a cable between the headphone pre-amplifier and the headphone. The headphone has two symmetrically designed electrostatic transducers in the push-pull mode of operation. The pre-amplifier is adapted to output an audio signal to be reproduced by way of a first amplifier stage as a voltage-amplified audio signal at an output. The headphone has second amplifier stages which are in the form of high-voltage amplifier stages which are supplied by way of the cable with a pre-amplified audio signal to be reproduced and a high-voltage supply.