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:
Mar. 22, 1977
Filed:
Oct. 07, 1975
Applicant:
Inventor:
Yasuo Nagahama, Hamamatsu, JA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10H / ; G10H / ;
U.S. Cl.
CPC ...
84-101 ; 84-125 ; 307261 ; 307265 ; 328 13 ; 328150 ; 328158 ; 328260 ;
Abstract
A waveform converter for use with an electronic musical instrument comprises an input for receiving a sawtooth wave tone signal, an output for delivering a rectangular wave tone signal, a semiconductor active element adapted to switch the output voltage from a first to a second voltage level when the input voltage exceeds the threshold voltage level of the waveform converter, and a variable bias source coupled to the input for controlling the duty factor of the rectangular wave output tone signal. The variable bias source includes a variable D.C. voltage source and a subaudio sine wave source.