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:
Oct. 11, 1994
Filed:
Dec. 02, 1991
Nobuyuki Kasuga, Hachioji, JP;
Akinori Maeda, Hachioji, JP;
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
The present invention provides a digital to analog converter circuit comprising a digital to analog converter portion for accepting digital inputs indicative of a signal level and for producing an analog output indicative of a difference in signal level between one digital input and a previous digital input. An integrator is coupled to the digital to analog converter portion for integrating the analog output thereby producing a substantially smooth waveform. The digital to analog converter portion may comprise a plurality of current source type digital to analog converters having a common output terminal and the integrator may comprise an integrating capacitor. In such an embodiment the output from the common output terminal is indicative of a signal level difference determined by at least two of the digital inputs.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile