Invention Grant
- Patent Title: Common-mode shifting circuit for CML buffers
- Patent Title (中): CML缓冲器的共模移位电路
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Application No.: US11141337Application Date: 2005-05-31
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Publication No.: US07355451B2Publication Date: 2008-04-08
- Inventor: Kameran Azadet , Fuji Yang , Chunbing Guo
- Applicant: Kameran Azadet , Fuji Yang , Chunbing Guo
- Applicant Address: US PA Allentown
- Assignee: Agere Systems Inc.
- Current Assignee: Agere Systems Inc.
- Current Assignee Address: US PA Allentown
- Agency: Synnestvedt & Lechner LLP
- Main IPC: H03K19/0175
- IPC: H03K19/0175

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.
Public/Granted literature
- US20060017468A1 Common-mode shifting circuit for CML buffers Public/Granted day:2006-01-26
Information query
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