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:
Jul. 13, 1999
Filed:
Aug. 18, 1997
Satoshi Ide, Kawasaki, JP;
Takaya Chiba, Sapporo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An automatic threshold control circuit includes a bottom detection circuit, a relative peak detection circuit, and a voltage divider circuit. The bottom detection circuit detects an absolute minimum level of an input signal, and the relative peak detection circuit detects, in accordance with the input signal, a maximum level relative to the minimum level detected by the absolute bottom detection circuit. Further, the voltage divider circuit generates a threshold level by dividing the absolute minimum level and the relative maximum level in a predetermined ratio. Using this configuration, a signal amplifying circuit can be constructed that is capable of accurately reproducing digital signals at all times regardless of variations in the amplitude or the DC level of the input signal.