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. 16, 2001
Filed:
Nov. 24, 1998
Applicant:
Inventors:
Assignee:
Korg Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 5/00 ;
U.S. Cl.
CPC ...
H03F 5/00 ;
Abstract
The output signal converter for a tube amplifier includes semiconductor devices for amplifying or attenuating an output signal of the tube amplifier while maintaining output properties of the tube amplifier. The output signal converter in preferred embodiments has an output transformer (,) connected to the tube amplifier, a current amplifier and a voltage amplifier serially connected with each other via a node, and a speaker (,). The current amplification factor (Ac) of the current amplifier (,) and the voltage amplification factor (Av) of the voltage amplifier (,) are related according to the following equation: Ac*Av=−k, wherein k is a constant.