| 摘要 |
The present invention provides a method and apparatus for current steering for an LVDS input buffer. A current steering circuit is configured to steer current to a first node and/or a second node in response to a comparison between the input common-mode signal and a reference signal. During high input common-mode, more current is steered to the P-channel differential pair node of the input buffer as compared to the N-channel differential pair node. During low input common-mode, more current is steered to the N-channel differential pair node of the input buffer as compared to the P-channel differential pair node. The current steering reduces jitter and achieves stable output of the input buffer over process, voltage and temperature. The method and apparatus provided ensures a stabilized summation of the currents ID1+ID3 and ID2+ID4 by steering current into the P-channel node or N-channel node.
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