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:
Nov. 23, 1993
Filed:
May. 28, 1991
Applicant:
Inventor:
Shuichi Yoshikawa, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ; H04L / ; H03D / ;
U.S. Cl.
CPC ...
375 27 ; 375 39 ; 375 67 ; 375 83 ; 332103 ; 329304 ; 360 32 ;
Abstract
A voice signal is modulated using two carriers which are perpendicular to each other. The modulated signal is supplied to a low-pass filter, and then sampled. The sampled data are encoded, and then stored. When the stored data are to be reproduced, the data are decoded, and sampled. The sampled data are supplied to a demodulator through a low-pass filter.