Difference between Signal Integrity and Crosstalk?

Hi, guys

Someone told me, the SI includes the Crosstalk.
What's the detail difference between SI and Crosstalk?

Thanks

Signal Integrity --> The integrity of the channel is affected by Diminishing/ Degrading signal. Signal integrity problem can also be because of high SNR (Signal to Noise Ratio)

Major problems for Signal Integrity

1: ) FCC Complaince fails

2: ) Chip fails to be compatible with the Board

3: ) The design works in the lab but fails to work properly in the field.

Major Signal Integrity issues

1: ) Electro Magnatic Interferences (EMI causes a major problem as electro magnetic lines of flux cuts across and results n increase in induced voltage)

2: ) Reflection and Transmission Problem

3: ) Cross-talk problem is mainly because of transmission wiring are very close by.

(In .13micron and 90nm technology since the wires are very closeby due to interfrences this cross talk problem occurs)

4: ) Cross coupled and De-coupling capacitances.

Here in micron and nano technology, there is no resistance only capacitive resistance which charges and discharges to the required amount.

Signal integrity is a major problem in few thousand gate design and its PCB based problem, but as the integration goes on building with Million+ Gate design Chip level signal integrity is the major concern

When u consider

.18 micron tech --- Aluminium is used for wiring

.13 micron tech --- Copper is used

90nm tech -- Ga As is used.. still there is some degradation in the transmitted signal is encountered.

In nano technology this signal integrity suffers a major drawback with delay due to wiring

In nano technology wiring delay is more than the GATE delay itself. In a fully fabricated nano meter technology based chip 75% of the total delay is because wiring. So much careful attention has to be taken while wiring and more over under this technology PRE-WIRING SIMULATION,SYNTHESIS AND OPTIMIZATION has to be done before we go in for actualy implementation.

THUS Signal integrity is posing a major problem (CHIP level) as we go in for heigher level of integration.

HOPE this helps

with regards,

SI include crosstalk, IR-drop and EM, etc.

The crosstalk is a part of signal integrity problem.

integrity also inclue transmission effects, ground bounce, etc.

AlexWan said:

Hi, guys

Someone told me, the SI includes the Crosstalk.
What's the detail difference between SI and Crosstalk?

Thanks

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