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A low-jitter and large-EMI-reduction spread spectrum clock generator (SSCG) for Serial-ATA (SATA) was developed. A low-jitter voltage-controlled oscillator (VCO) with a high-frequency limiter was developed to prevent the SSCG from malfunctioning. This VCO achieved far less jitter than that of a conventional VCO. An autocalibration technique suitable for this VCO was developed to prevent the SSCG from...
A serial ATA PHY was fabricated in a 0.15-mum CMOS process with a technique of calibrating a spread spectrum clock generator (SSCG). This technique involves calibrating the SSCG output signal frequency, which does not meet the serial-ATA specifications due to large variations in the reference oscillator, by utilizing the received signal during a power-on sequence. This is achieved by shifting the...
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