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Congratulations to Credo Technology Group Limited

Posted by William P. Ramey III | Mar 06, 2020 | 0 Comments

Ramey & Schwaller wishes to congratulate its client Arx Pax Labs on issuance of U.S. Patent Number 10,313,165 titled FINITE IMPULSE RESPONSE ANALOG RECEIVE FILTER WITH AMPLIFIER-BASED DELAY CHAIN on June 4, 2019.  High-data rate channel interface modules and equalization methods employing a finite impulse response (FIR) analog receive filter. Embodiments include an illustrative channel interface module having multiple amplifier-based delay units arranged in a sequential chain to convert an analog input signal into a set of increasingly-delayed analog signals that are weighted and combined together with the analog input signal to form an equalized signal; and a symbol decision element operating on the equalized signal to obtain a sequence of symbol decisions. An interface that extracts received data from the sequence of symbol decisions. The delay units may employ one or more delay cells each having a common-source amplifier stage followed by a source follower output stage, the two stages providing approximately equal portions of the propagation delay. An enhanced gate-to-drain capacitance in the common-source amplifier may increase propagation delay while reducing bandwidth limitations.

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William P. Ramey III

Managing Partner; Office: Houston


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