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. 23, 1998
Filed:
Sep. 11, 1996
Applicant:
Inventors:
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330289 ; 330307 ;
Abstract
A semiconductor device for amplifying audio signals of the present invention comprises a preamplifier chip for amplifying small signals representing audio signals; a power amplifier chip which receives and power-amplifies the amplified audio signals from the preamplifier chip and outputs the same ; and a frame where the preamplifier chip and the power amplifier chip are mounted and which includes a heat sink area connected to a terminal for heat radiation, wherein the heat sink area is located adjacent to an area in the frame where the power amplifier chip is mounted, and the preamplifier chip, the power amplifier chip and the frame are packaged together.