Low-Power Digitally Controlled Oscillator (DCO) for SoC Applications

A. V. M. Pavan Kumar; T. Kiran Kumar; V. G. Pavan Kumar

In this paper, a novel portable and all-digital spread spectrum clock generator (ADSSCG) suitable for system-on-chip (SoC) applications with low-power consumption is presented. The proposed ADSSCG can provide flexible spreading ratios by the proposed rescheduling division triangular modulation (RDTM). Thus it can provide different EMI attenuation performance for various system applications. Furthermore, the proposed ADSSCG employs a low-power digitally controlled oscillator (DOC) to save overall power consumption significantly. Measurement results show that power consumption of the proposed ADSSCG is 1.2 mW (@54 MHz), and it provides 9.5 dB EMI reductions with 1% spreading ratio. Besides, the proposed ADSSCG has very small chip area as compared with conventional SSCGs which often required large on-chip loop filter capacitors. In addition, the proposed ADSSCG is implemented only with standard cells, making it easily portable to different processes and very suitable for SoC applications.

Select Volume / Issues:

• Volume 4 Issue 2, March. 2013

Year:

2013

Type of Publication:

Article

Keywords:

All Digital Spread Spectrum Clock Generator ADSSCG; Digitally Controlled Oscillator DOC; Low Power; Portable; Triangular Modulation

Journal:

IJECCE

Volume:

4

Number:

2

Pages:

474-477

Month:

March