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. 21, 2005
Filed:
Apr. 30, 2004
Applicant:
Masashi Horimoto, Kyoto, JP;
Inventor:
Masashi Horimoto, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F003/45 ;
U.S. Cl.
CPC ...
Abstract
An amplifier has a p-type and an n-type difference transistor pairs providing respective outputs, and is adapted to provide the outputs of the pairs in an integrated form. When the level of the input signal is below a predetermined level, only the p-type difference transistor pair is activated, and when the level of the input signal is higher than the predetermined level, the n-type difference transistor pair is also activated. The amplifier has an expanded dynamic range with a suppressed noise level.