| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a clock generator and an associated method for generating a clock signal, for driving a microprocessor or other digital circuit at relatively high frequencies, while reducing the spectral amplitude of EMI components as measured over a relatively large bandwidth. <P>SOLUTION: A clock circuit includes an oscillator for generating a reference frequency signal and a spread spectrum clock generator cooperating with the oscillator for generating a spread spectrum clock output signal having a fundamental frequency and reduced amplitude EMI spectral components at harmonics of the fundamental frequency. The spread spectrum clock generator includes a clock pulse generator for generating a series of clock pulses and a spread spectrum modulator for frequency modulating the clock pulse generator to broaden and flatten amplitudes of EMI spectral components which would be produced by the clock pulse generator. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
