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. 13, 1990
Filed:
Jul. 01, 1988
Paul S Breedlove, Plano, TX (US);
James H Moore, Lubbock, TX (US);
George L Brantingham, Lubbock, TX (US);
Richard H Wiggins, Jr, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An electronic hand-held, talking learning aid is disclosed. The learning aid includes a MOS speech synthesizer chip having an active surface area on the order of 45,000 square mils. The disclosed speech synthesizer chip includes a digital lattice filter, a voiced/unvoiced excitation circuit, a speech parameter interpolator, an input parameter decoder, a digital-to-analog converter and associated timing circuits. The learning aid is also provided with a microprocessor which functions as a controller for controlling the operation of the unit. A small speaker is driven by the digital-to-analog converter on the speech synthesis chip and a keyboard and display device are strobed by the microprocessor controller. Features include modes in which a speech synthesizer recites instructions or questions to the operator who must properly respond.