A 2.4-GHz monolithic fractional-N frequency synthesizer with robust phase-switching prescaler and loop capacitance multiplier Academic Article

abstract

• The design of a 2.4-GHz fully integrated fraction-N frequency synthesizer in o.35-m CMOS process is presented. The design focuses on the prescaler and the loop filter, which are often the speed and the integration bottlenecks of the phase-locked loop (PLL), respectively. a 1.5-V 3-mW inherently glitch-free phase-switching prescaler is proposed. It is based on eight lower frequency 45-spaced phases and a reversed phase-switching sequence. The large integrating capacitor in the loop filter was integrated on chip via a simple capacitance multiplier that saves silicon area, consumes only 0.2 mW, and introduces negligible nose. The synthesizer has a 9.4% frequency tuning range from 2.23 to 2.45 GHz. It dissipates 16 mW and takes an active area of 0.35 mm2 excluding the 0.5-mm2 digital modulator.

authors

• Silva-Martinez, Jose

published proceedings

• IEEE JOURNAL OF SOLID-STATE CIRCUITS

altmetric score

• 6

author list (cited authors)

• Shu, K. L., Sanchez-Sinencio, E., Silva-Martinez, J., & Embabi, S.

citation count

• 134

complete list of authors

• Shu, KL||Sanchez-Sinencio, E||Silva-Martinez, J||Embabi, SHK

publication date

• June 2003

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

keywords

• Capacitance Multiplier
• Cmos
• Fractional-n
• Frequency Synthesizer
• Loop Filter
• Phase-locked Loop (pll)
• Phase-switching Prescaler
• Sigma-delta (sigma Delta)

Digital Object Identifier (DOI)

• 10.1109/JSSC.2003.811875

start page

• 866

end page

• 874

volume

• 38

issue

• 6

URL

• http%3A%2F%2Fdx.doi.org%2F10.1109%2Fjssc.2003.811875