Abstract
A transmitter-side spread-spectrum clock generator (TXSSCG) with a second-order ΔΣ modulator is proposed for a 6-Gbps Serial ATA. Mixed-mode simulations show that a second-order ΔΣ modulator in TX-SSCG reduces the random jitter component of the receiver-side tracking skew through quantization noise shaping. Deterministic jitter is reduced with the loop bandwidth of RXPLL. A 0.13-μm CMOS prototype chip shows that the transceiver operates at 6Gbps over an 8-m SATA cable in TX-SSCG on and off. With TXSSCG on, the spectrum is down-spread with 11.7-dB peak reduction and 5000-ppm spread amount.
Original language | English |
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Pages (from-to) | 931-935 |
Number of pages | 5 |
Journal | IEICE Electronics Express |
Volume | 7 |
Issue number | 13 |
DOIs | |
State | Published - 10 Jul 2010 |
Keywords
- Jitter
- Serial ATA
- Serial link
- Spread-spectrum
- ΔΣ modulator