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. 08, 1986
Filed:
Nov. 15, 1984
Applicant:
Inventors:
Ryoji Shimozono, Kawasaki, JP;
Yasunori Ogawa, Yokohama, JP;
Yasuo Tanaka, Yokohama, JP;
Shigeo Sano, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H04L / ;
U.S. Cl.
CPC ...
332 / ; 328 14 ; 332 / ; 375 45 ; 375 62 ; 364721 ;
Abstract
A mixed dual frequency generating system for generating a digital FSK signal or a signal including two mixed frequencies includes a ROM which stores in consecutive addresses sampled data obtained by sampling a sine wave at a sampling frequency. The mixed dual frequency generating system also includes a data extracting circuit for extracting the sampled data from the ROM at the sampling frequency using an extracting step number. An output data fixing circuit changes alternate data extracted from the ROM to data 'O', so that a signal having two mixed frequencies can be obtained.