PRINTED CIRCUIT BOARD FOR NOTEBOOK COMPUTER MEMORY MODULE

摘要

PURPOSE: A printed circuit board for notebook computer memory module is provided to obtain a high capacity memory module by forming a phase locked loop(PLL) device mounting section at the printed circuit board. CONSTITUTION: A printed circuit board(10) includes a PLL device mounting section(20) which is arranged in such a manner that the clock signal terminal of the tap of the PCB is connected to the clock input terminal(CLK_IN) of the PLL device mounting section, and first to third clock signal terminals(CLK_OUT1 to CLK_OUT) of the PLL device mounting section are connected to the clock input terminals(CLK) of first to twelfth memory elements(31-42). A PLL device(25) mounted to the PLL device mounting section outputs first to third clock signals(CLK_OUT1 to CLK_OUT3) from the system clock which is input through the tap of the PCB of the memory module. The first clock signal is input to the clock terminals of first to fourth memory elements(31-34) so as to drive first to fourth memory elements, the second clock signal is input to the clock terminals of fifth to eighth memory elements so as to drive fifth to eight memory elements, and the third clock signal is input to the clock terminals of ninth to twelfth memory elements so as to drive ninth to twelfth memory elements.