Clock signal generation device and method

Details Clock signal generation device and method Clock signal generation device and method

2011-01-18

2011-01-18

Patel, Nitin C (Department: 2116)

Electrical computers and digital processing systems: support

Clock, pulse, or timing signal generation or analysis

C713S501000, C713S502000, C713S503000

Reexamination Certificate

active

07873858

ABSTRACT:
A clock signal generator for a USB device. The clock signal generator includes a control circuit and a clock generator that does not need to include a crystal oscillator. The control circuit counts the cycle of the clock signal during the period between two sync signals successively inputted, and generates a frequency control signal corresponding to the count value. The clock generator generates the clock signal with a frequency corresponding to the frequency control signal. The clock signal generator can generate a clock signal that is suitable for the data transfer rate defined, in the USB specification. In addition, the clock; signal generator can generate an RX clock signal so that an RX data signal can be recovered with its energy being stable.

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