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. 21, 1990
Filed:
Feb. 16, 1989
Takayuki Kohdaka, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A floating-point digital-to-analog converting system which includes a mantissa digital-to-analog converter (DAC) and an exponent DAC. Normally, the mantissa DAC has a digital-to-analog converting accuracy higher than that of the exponent DAC because of differences in their construction. Hence, as long as the accuracy of the mantissa DAC is greater than that of the exponent DAC, an analog mantissa output from the mantissa DAC is used as an analog output of the present system. On other other hand, once the accuracy of the mantissa DAC goes below that of the exponent DAC, data obtained by shifting digital input data is applied to the mantissa DAC. Then, the exponent DAC multiplies the analog mantissa by a weight corresponding to the digital exponent data included in the digital input data. Thus, an analog output is obtained from the exponent DAC.