L2042A

The L2042A is targeted  towards digital flat panel  applications for Notebook PCs, Palm-size PCs, office  automation equipment, and LCD monitors.  
 
 

The L2042A is a versatile spread spectrum frequency modulator designed specifically for digital falt panel  applications. The L2042A reduces electromagnetic  interference (EMI) at the clock source, allowing system  wide reduction of EMI of  down stream clock and data  dependent signals. The L2042A allows significant system cost savings by reducing the number of circuit board  layers ferrite beads,  shielding and other passive  components that are traditionally required to pass EMI  regulations.
 
The L2042A uses the most efficient and optimized  modulation profile approved by the FCC and is  implemented in a proprietary all digital method.  
 
The L2042A modulates the output of a single PLL in  order to !°spread!± the bandwidth of a synthesized clock nd more importantly, decreases the peak amplitudes of its harmonics. This results in significantly lower system  EMI compared to the typical narrow band signal produced  by oscillators and most frequency generators. Lowering  EMI by increasing a signal!s bandwidth is called !(R)sprea pectrum clock generation!.