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:
Sep. 08, 2009
Filed:
Aug. 30, 2007
Man Suk Seo, Gyunggi-do, KR;
Hyung Cheol Park, Daejeon, KR;
Seong Soo Lee, Gyunggi-do, KR;
Sang Yub Lee, Gyunggi-do, KR;
Chang Soo Yang, Gyunggi-do, KR;
Wan Cheol Yang, Gyunggi-do, KR;
Man Suk Seo, Gyunggi-do, KR;
Hyung Cheol Park, Daejeon, KR;
Seong Soo Lee, Gyunggi-do, KR;
Sang Yub Lee, Gyunggi-do, KR;
Chang Soo Yang, Gyunggi-do, KR;
Wan Cheol Yang, Gyunggi-do, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, Gyunggi-Do, KR;
Abstract
Provided is a digital modulation circuit constructed with only a digital circuit. The digital modulation circuit includes: a clock generator which generates a reference clock pulse having a predetermined period; an up/down counter which generates a count value having predetermined bits by up-counting or down-counting the reference clock pulse and outputs a bit in the count value as a transmission signal; a controller which determines a counting start/end time point of the up/down counter and determine which one of the up-counting operation and the down-counting operation of the up/down counter is to be performed, according to a value of digital transmission data that is to be transmitted; and a band-pass filter which converts a waveform of the transmission signal output from the up/down counter into a sine waveform.