A 2.1-GHz monolithic frequency synthesizer with robust phase switching prescaler and loop capacitance scaling Conference Paper uri icon


  • This paper presents the design of a 2.1-GHz fully integrated ΣΔ fractional-N frequency synthesizer in 0.35um CMOS technology. The improved low-voltage, low-power, inherently glitch-free phase switching prescaler is used in this work. With capacitance scaling, large capacitors in the loop filter can be integrated on chip within small area. With several different digital ΣΔ modulators designed on chip, optimal design of the digital ΣΔ modulator for the fractional-N synthesizer will be investigated experimentally. The supply voltage is 1.5V for VCO and prescaler and 2-V for other blocks. The synthesizer dissipates 16mW and has an area of 0.85mm2 excluding pads.

author list (cited authors)

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

publication date

  • January 2002