Although there are pre-emphasis
and equalization techniques to recover the eye diagram from a near-closed state, skew poses a unique challenge.
Long distance transmission with less distortion by pre-emphasis
To guarantee optimal signal integrity, the I/O technology includes transmit pre-emphasis
, receive equalization, low jitter clocks, and noise isolation design techniques.
CalDriCon offers a solution not to distort eye diagram at receivers with pre-emphasis
For example, macromodeling would be using a traditional IBIS model with an external VHDL-AMS model to represent a SerDes IO buffer with pre-emphasis
3V, 4-channel, 1:1 DP-to-DP ReDriver supporting automatic pre-emphasis
and output swing regeneration (using Link Training signaling) will sample February 2009, at 250K/yr: $1.
, which facilitates equalization of optical powers or optical signal-to-noise-ratios of all the WDM wavelength channels propagating in a fiber; and many other innovations.
The new products reportedly feature: receive equalization (Rx EQ) and transmit pre-emphasis
to improve signal integrity; impendent pre-emphasis
control, allowing designers to tune outputs according to different trace or cable lengths; low power at 600mW; external control of Vbb; as well as low jitter performance (30 picoseconds) at 4.
With three mouse clicks, the eye diagram of a 30-inch long version of the microstrip above was simulated (FIGURE 3) and in one mouse click, the improvement when adding 50% pre-emphasis
was simulated (FIGURE 4).
Often a technique called pre-emphasis
is used by a transmitter to limit the overshoot during consecutive 1's or 0's.
In particular, the device allows users to tailor signal integrity by fine-tuning transmitter pre-emphasis
, receiver equalization and output voltage swing through over 36 programmable settings to optimally offset system-specific backplane and interconnect losses.
, amplitude, and impedance in the transmitter