SEMICONDUCTOR INTEGRATED CIRCUITS
Guo Haiyan, Chen Zao, Zhang Bo and Li Zhaoji
Abstract: A novel monolithic digitalized random carrier frequency modulation spread-spectrum clock generator (RCF-SSCG) is proposed. In this design, the output frequency of the proposed RCF-SSCG changes with the intensity of the capacitive charge and discharge current. Its analytical model is induced and the effect of the modulation parameters on the spread spectrum is numerically simulated and discussed. Compared with other works, this design has the advantages of small size, low power consumption and good robustness. The circuit has been fabricated in a 0.5 μm CMOS process and applied to a class D amplifier in which the proposed RCF-SSCG occupies an area of 0.112 mm2 and consumes 9 mW. The experimental results confirm the theoretical analyses.
Key words: Ransom carrier frequency modulation spread-spectrum clock generator, class D amplifier, electromagnetic interference
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Received: 18 August 2015 Revised: 23 February 2010 Online: Published: 01 June 2010
| Citation: |
Guo Haiyan, Chen Zao, Zhang Bo, Li Zhaoji. An advanced monolithic digitalized random carrier frequency spread-spectrum clock generator for EMI suppression[J]. Journal of Semiconductors, 2010, 31(6): 065010. doi: 10.1088/1674-4926/31/6/065010
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Guo H Y, Chen Z, Zhang B, Li Z J. An advanced monolithic digitalized random carrier frequency spread-spectrum clock generator for EMI suppression[J]. J. Semicond., 2010, 31(6): 065010. doi: 10.1088/1674-4926/31/6/065010.
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