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A 9.1-to-11.5-GHz Four-Band PLL for X-Band Satellite & Optical Communication Applications
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- Issue Date
- 2007-06
- Citation
- Radio Frequency Integrated Circuits Symposium (RFIC) 2007, pp.233-236
- Language
- English
- Type
- Conference Paper
- Abstract
- In this paper, a 9.1 to 11.5 GHz four-band PLL is presented. In the proposed PLL, both an improved multimodulus (MM) divider and an adaptive four-band LC VCO are depicted. The MM divider provides division ratios of 6 to 455 depending on the division mode of the six-mode prescaler. The LC VCO generates four bands of oscillation frequencies covering 9.1 - 11.6 GHz, including an adaptive cross-coupled MOS array. The cross-coupled MOS array was devised to reduce the area of the capacitor array and compensate for the oscillation power. The PLL achieves phase noises of - 98 dBc/Hz from 11.4 GHz and - 102 dBc/Hz from 9.61 GHz, at an offset of 980 kHz. The PLL consumes 32mA at 1.2V. It was fabricated using 130nm CMOS process technology. © 2007 IEEE.
- KSP Keywords
- 5 GHz, 6 GHz, CMOS process technology, Capacitor array, LC voltage controlled oscillator(LC-VCO), Oscillation Frequency, communication applications, cross-coupled, four-band, optical communications, x-band