US Patent 7457387 Method for generating transmitter clock

A transmit clock generator includes a first local clock generator and a second local clock generator, each receiving an external PLL clock signal and respectively generating first and second divided clock signals. A synchronization signal is applied to the first local clock generator and second local clock generator during a clock training period to enforce a phase relationship between the first and second divided clock signals. The synchronization signal includes at least one synchronization pulse that is applied to the first local clock generator and second local clock generator during the clock training period.