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Design >> High-Speed I/O Design >> Pre-emphasis w/o clock
https://designers-guide.org/forum/YaBB.pl?num=1237570879

Message started by neoflash on Mar 20^th, 2009, 10:41am

Title: Pre-emphasis w/o clock
Post by neoflash on Mar 20^th, 2009, 10:41am

There is a requirement to implement Tx CML signal Pre-emphasis w/o clock.

Any reference of such kind of implementations?

Title: Re: Pre-emphasis w/o clock
Post by blam on Jul 23^rd, 2009, 12:29pm

Does w/o clock mean w/o using a flop inside the pad? Pre-emphasis in this case is only to boost the rising/falling edge with a short pulse instead of a whole bit.

Title: Re: Pre-emphasis w/o clock
Post by love_analog on Apr 7^th, 2010, 2:16pm

You cannot do this. For pre-emphasis you need to use the previous bit. which means you need at least 1 flop somewhere in the chain.

Title: Re: Pre-emphasis w/o clock
Post by casual on Apr 13^th, 2010, 5:46pm

Preemphasis signal is at the output. Internal circuits can be any stuff as long as spec is fulfill. Preemphasis can be generated by using 1 bit or half bit method by mean of flipflop