Demand for low cost Serializer and De-serializer (SerDes) integrated circuits has
increased due to the widespread use of Synchronous Optical Network (SONET)/Gigabit
Ethernet network and chip-to-chip interfaces such as PCI-Express (PCIe), Serial
ATA(SATA) and Fibre channel standard applications. Among all these applications,
clock data recovery (CDR) is one of the key design components. With the increasing
demand for higher bandwidth and high integration, Complementary metal-oxidesemiconductor
(CMOS) implementation is now a design trend for the predominant
products.
In this research work, a fully integrated 10Gb/s (OC-192) CDR architecture in
standard 0.18
μ
m CMOS is developed. The proposed architecture integrates the typically
large off-chip filter capacitor by using two feed-forward paths configuration to generate
the required zero and poles and satisfies SONET jitter requirements with a total power
dissipation (including the buffers) of 290mW. The chip exceeds SONET OC-192 jitter
tolerance mask, and high frequency jitter tolerance is over 0.31 UIpp by applying PRBS data with a pattern length of 231-1.The implementation is the first fully integrated 10Gb/s
CDR IC which meets/exceeds the SONET standard in the literature.
The second proposed CDR architecture includes an adaptive bang-bang control
algorithm. For 6MHz sinusoidal jitter modulation, the new architecture reduces the
tracking error to 11.4ps peak-to-peak, versus that of 19.7ps of the conventional bangbang
CDR. The main contribution of the proposed architecture is that it optimizes the
loop dynamics by adjusting the bang-bang bandwidth adaptively to minimize the steady
state jitter of the CDR, which leads to an improved jitter tolerance performance.
According to simulation, the jitter performance is improved by more than 0.04UI,which
alleviates the stringent 0.1UI peak to peak jitter requirements in the PCIe/Fibre
channel/Sonet Standard.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2396 |
| Date | 2008 December 1900 |
| Creators | Li, Jinghua |
| Contributors | Silva-Martinez, Jose |
| Source Sets | Texas A and M University |
| Language | English |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | electronic, application/pdf, born digital |
Page generated in 0.0018 seconds