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:
Apr. 08, 2008
Filed:
May. 31, 2005
Kameran Azadet, Morganville, NJ (US);
Fuji Yang, Holmdel, NJ (US);
Chunbing Guo, Allentown, PA (US);
Kameran Azadet, Morganville, NJ (US);
Fuji Yang, Holmdel, NJ (US);
Chunbing Guo, Allentown, PA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
A common-mode shifting circuit for shifting the common-mode output voltage of a CML device to an arbitrary voltage is disclosed. A constant current source is provided at each output of the CML device. The constant current may be a positive or negative current, tending to raise or lower the common-mode output voltage, respectively. The constant current sources are preferably connected to an alternate voltage supply having a higher voltage than that the supply for the CML device. The invention further provides a method for adjusting the output signal of a current-mode logic circuit having two or more output ports, comprising the step of providing a constant current at each output port of the current-mode logic circuit, whereby the common-mode voltage at the output ports of said current-mode logic circuit is level-shifted.