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:
Oct. 27, 1992
Filed:
Dec. 20, 1991
Duck-young Jung, Incheon, KR;
Seung-yup Koo, Seoul, KR;
Samsung Electronics Co., Ltd., Kyunggi-do, KR;
Abstract
A noise reduction circuit includes a main signal path and an auxiliary signal path having a high-pass filter characteristic. The noise reduction circuit may be used as a compression circuit or an expansion circuit in conjunction with a transmitter or a receiver, respectively. The auxiliary signal path includes a voltage dividing circuit, a voltage-to-current coverting circuit; a differential amplifier, and a voltage buffer connected between an input terminal and an operational amplifier. The main signal path is constituted by a resistance connected between the input terminal and the operational amplifier. The noise reduction circuit improves precision by eliminating the influence of absolute value variation of resistance which can occur in integrated circuit fabrication.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile