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. 02, 1976
Filed:
Jun. 12, 1973
Kinji Kawamoto, Neyagawa, JA;
Matsushita Electric Industrial Co., Ltd., Osaka, JA;
Abstract
Electronic expression device for producing a novel tremulant effect. The device has a frequency range separator separating an audio frequency signal into a plurality of sub-band signals at least one modulation system being connected to the frequency range separator in order to modulate the sub-band signals other than the lowest sub-band signal, and a coupling means for coupling the output signals of the modulation systems and the lowest sub-band signal. Each of the modulation systems has at least one modulator having a characteristic such that at least the modulation depth increases in accordance with an increase in the frequency of the input signal and the modulation depth exceeds .+-..pi./2 radian for phase modulation and 100 percent for amplitude modulation in a high frequency range. The audio frequency signal applied to the input terminal is translated in such a manner that frequency spectra of the signal are fluctuating differently with respect to the frequency, phase and amplitude from each other in high frequency ranges corresponding to the sub-band signals except the lowest, but are not fluctuating in the lowest sub-band frequency range.