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:
Dec. 02, 1997
Filed:
Jul. 21, 1995
Shih-Wei Huang, Taipei, TW;
Yu-Heng Hsueh, Feng Shan, TW;
Chaw Khong Co., Ltd., Taipei County, TW;
Abstract
This invention relates to a gain control system for handling periodic noises to facilitate receiving of data signals in a noisy environment such as a powerline. The gain control system includes a period detector for detecting periods of the periodic noises and generating a SYNC signal for each detected period; a signal converter for digitizing the input signals; signal analyzing means for analyzing the digitized input signals received between two SYNC signals and generating a gain control table for flattening the periodic noises contained between two SYNC signals; a gain controller for amplifying the input signals; and a control signal generator for generating a sequence of gain control signals according to the gain control table after each SYNC signal to control the gain controller whereby the periodic noises contained between each pair of SYNC signals are flattened by the gain controller. The gain control system of the present invention can effectively catch and amplify those periodic noises without using real time monitoring and real time feed back techniques and thus can greatly reduce the implementation and operational costs of a traditional digital gain control system used in the same environment.