US 7,321,239 B2 | ||
Differential line receiver | ||
Mats Olof Joakim Hedberg, Haninge (Sweden); and Tord Haulin, Uppsala (Sweden) | ||
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (Sweden) | ||
Appl. No. 10/482,811 PCT Filed Jun. 28, 2002, PCT No. PCT/EP02/07186 § 371(c)(1), (2), (4) Date Jun. 22, 2004, PCT Pub. No. WO03/005587, PCT Pub. Date Jan. 16, 2003. |
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Claims priority of application No. 01115699 (EP), filed on Jul. 05, 2001. | ||
Prior Publication US 2004/0247036 A1, Dec. 09, 2004 | ||
Int. Cl. H03K 19/20 (2006.01); H03K 19/094 (2006.01) |
U.S. Cl. 326—82 [326/115] | 13 Claims |
1. A differential line receiver circuit for receiving differential digital signals from a transmission line, comprising
a differential input stage having a differential input for coupling with said transmission line;
an output stage having a differential signal current interface with said input stage for receiving differential driving currents
from said input stage, and a circuit for translating said driving currents into complementary binary output signals, the rise
time and fall time of the edges of said binary output signals depending on the levels of said driving currents; and
a timing deviation detector circuit coupled to the outputs of said output stage, for detecting at least one of deviations
between the rise time and the fall time of said complementary binary output signals and deviations of the timing of the rising
and the falling edges, and generating a detector signal in accordance with the detected deviation; wherein said input stage
comprises
a first current source for generating a source current and a second current source for generating a sink current; and
a switching stage for switching in accordance with said signals received from said transmission line said currents generated
by said first and said second current sources into said interface of said output stage for translation by said output stage
into said complementary binary output signals; and
a current source control circuit for controlling the respective amount of current generated by at least one of said first
and said second current sources by generating respective current control signals based on said detector signal.
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