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. 03, 2006
Filed:
Sep. 27, 2005
Toshiaki Nagai, Kawasaki, JP;
Hiroshi Yamazaki, Kawasaki, JP;
Toshiaki Nagai, Kawasaki, JP;
Hiroshi Yamazaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
There is provided a complex type sigma-delta analog to digital conversion unit that includes: a first subtractor; a first filter; a first analog to digital converter; a first digital to analog converter; a first sign controller; a second subtractor; a second filter; a second analog to digital converter; a second digital to analog converter; and a second sign controller, wherein the first sign controller inverts a positive/negative sign of an output signal of the first filter in response to a control signal and outputs it to the second filter, and the second sign controller inverts a positive/negative sign of an output signal of the second filter in response to the control signal and outputs it to the first filter.