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:
Jul. 08, 2003
Filed:
Apr. 04, 2002
Susan Mary Dacy, Cambridge, MA (US);
Richard Eugene Schreier, North Andover, MA (US);
Other;
Abstract
A mixing DAC includes an analog output network; a current source; a current switching circuit connected between the current source and the analog output network; a switch driver circuit responsive to a digital input at a first rate and a clock signal having a predetermined period for driving the current switching circuit to selectively interconnect the current source and the analog output network; and a waveform generator for driving the current source to produce an output current including a plurality of peaks at a second rate during each clock period to up-convert the response energy of the DAC analog output to approximately the second rate.