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. 06, 2001
Filed:
May. 03, 2000
Mandell J. Mangahas, Allentown, PA (US);
Ramin Khoini-Poorfard, Coopersburg, PA (US);
Agere Systems Guardian Corp., Allentown, PA (US);
Abstract
A signal processing system includes a main digital-to-analog converter (DAC) for receiving a digital baseband signal and converting the digital signal into an analog signal. Also included in the system is a connection circuit for receiving the analog signal, and output terminal, and an analog filter coupled between the connection circuit and the output terminal for filtering the analog signal. The system includes a calibration circuit coupled between the connection circuit and the output terminal for setting an offset voltage level. The calibration circuit includes (a) an approximation circuit coupled to the output terminal and operable during a calibration mode to determine the offset voltage level and store the offset voltage level as a digital offset signal and (b) an offset DAC coupled between the connection circuit and the approximation circuit for converting the digital offset signal into the offset voltage level. The connection circuit, which is a node, subtracts the offset voltage level from the analog signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile