Patent ID: 9256244
Filing Date: 2016-02-09
CPC Classification: G06F,H03L

Claim Text:
1. A USB3.0 clock frequency generation device without crystal oscillator, the USB3.0 clock frequency generation device comprising: an oscillator block, which is to generate and output a primary frequency signal; a preset number block, which is to generate and output a preset number; a delta-sigma modulator block, which is to input an error number and the preset number, and to output a divider number after performing Delta-Sigma calculation of the error number and the preset number; a frequency divider block, which is to input the divider number and the primary frequency signal, and to output a secondary frequency signal; a USB3.0 super-speed PLL, connected to the frequency divider block to input the secondary frequency signal and then to output a first clock signal and a second clock signal; a USB3.0 super-speed PHY, connected to the USB3.0 super-speed PLL to input the second clock signal and to output a third clock signal; and a frequency counter, connected to the USB3.0 super-speed PLL, the USB3.0 super-speed PHY, and the delta-sigma modulator block to input the first clock signal and the third clock signal and to output the error number after counting the difference between the third clock signal and the first clock signal.