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. 30, 1976
Filed:
Nov. 19, 1975
Akira Mitarai, Yamatokoriyama, JA;
Sharp Kabushiki Kaisha, Osaka, JA;
Abstract
In obtaining a sinusoidal waveform signal of a predetermined frequency, a rectangular waveform signal having a frequency four times higher than the pedetermined frequency of the sinusoidal waveform signal is provided and then subjected to frequency divisions of 1/2 and 1/4 through the use of a couple of binary counters. While the original rectangular waveform signal and the 1/2 frequency divided rectangular waveform signal are both passed through an EXCLUSIVE OR circuit, the 1/2 frequency divided and 1/4 frequency divided rectangular waveform signals are passed through another EXCLUSIVE OR circuit. Both of the outputs of the EXCLUSIVE OR circuits are added to develop a desired step waveform signal, after being evaluated at different weights. The generation of the predetermined sinusoidal waveform signal is achieved by filtering the thus obtained step waveform signal.