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:
Aug. 19, 1980
Filed:
Jun. 23, 1978
Christian J Deforeit, 91621 La Ville de Bois, FR;
Other;
Abstract
A polyphonic digital synthesizer which will generate a plurality of periodic signals in real time with independent control of amplitudes. A set of digital memories are at least equal in number to the periodic signals to be produced, the address of each memory determining the frequency of a signal and the content of said memory determining at least the amplitude of said signal. Digital to analog conversion means produce positive or negative analog voltage or current steps whose amplitude is proportional to a data item read in a memory and in response to control signals. These reading and transfer of the data from the memories to the conversion means and conversion control signals are provided in accordance with the transitions of pulsed signals whose repetition frequencies are distributed over a predetermined musical range. Complex output signals can be obtained by writing data in the memories according to an additive synthesis method.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile