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:
Aug. 29, 2000
Filed:
Apr. 30, 1998
Fujio Yamasita, Tokyo, JP;
Wako Technical Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a preamplifier, by which it is possible to prevent influence of noise components when there are noise components in power line. There is provided a transformer having a primary winding with a center tap and a secondary winding on output side, and the primary winding of the transformer is connected between plates of two vacuum tubes for performing differential amplification, and positive voltage is applied on the center tap of the primary winding. A switch may be arranged in such manner that input signal and output signal can be separately set to balanced state or unbalanced state.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile