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A 2.9-GHz LC-VCO Based PLL with a Fast Automatic Frequency Control
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- Authors
- Hui Dong Lee, Nam-Sik Ryu, Jae-Ho Jung, Kwang Chun Lee
- Issue Date
- 2012-08
- Citation
- International Symposium on Wireless Communication Systems (ISWCS) 2012, pp.860-864
- Language
- English
- Type
- Conference Paper
- Abstract
- A 2.9-GHz LC-VCO based PLL with a fast automatic frequency control (AFC) circuit is proposed. The fast AFC function is achieved by a fourfold reference frequency multiplication and a binary searching algorithm in a 4-bit capacitor array of an LC-VCO and completed in 4-cycles of the reference signal. The simulation results for the proposed PLL designed in a CMOS 130 nm process, show that an AFC time of only 100 ns, operation frequencies of 2.14 to 2.95 GHz, and a phase noise of -125 dBc/Hz at 1 MHz offset, while dissipating 4.9 mA at a 1.2-V supply. © 2012 IEEE.
- KSP Keywords
- 130 nm, 5 GHz, Automatic frequency control, Binary searching, CMOS 130, Capacitor array, Fast automatic, Frequency Multiplication, LC voltage controlled oscillator(LC-VCO), Reference frequency, Searching algorithm