Spread spectrum clock generator, pulse pattern generator, spread spectrum clock generation method and pulse pattern generation method

摘要

To provide a spread spectrum clock generator and a spread spectrum clock generation device capable of improving the reliability of the measurement result by measuring an object to be measured by using spread spectrum clock signal obtained by making the frequency deviation for a modulation frequency specified in a communication standard sufficiently small as a spectrum modulated according to the communication standard.SOLUTION: A first division ratio D, a second division ratio D, a first triangular wave generation number Rand a second triangular wave generation number Rare calculated such that a difference between a triangular wave frequency fd and an average frequency Δfd of a set of waveforms combining multiple triangular waves is within 0.1%, and a spread spectrum clock signal is generated by frequency modulation based on a set of waveforms obtained by frequency division using these ratios and numbers.SELECTED DRAWING: Figure 1