Title :
A multiple modulator fractional divider
Author :
Miller, Brian ; Conley, Bob
Author_Institution :
Hewlett-Packard, Spokane, WA, USA
Abstract :
Based on oversampling A/D conversion technology which allows the spectrum of error energy to be shaped so that fractional synthesis error energy is pushed away from the carrier, a CMOS integrated fractional-N divider is presented. A complete fractional-N phase locked loop (PLL) which was constructed utilizing only the CMOS divider, a dual modulus prescaler, a simple loop filter, and a voltage controlled oscillator is discussed. The resulting PLL is shown to exhibit no fractional spurs
Keywords :
CMOS integrated circuits; frequency dividers; phase-locked loops; CMOS divider; PLL; VCO; dual modulus prescaler; loop filter; multiple modulator fractional divider; oversampling A/D conversion; phase locked loop; voltage controlled oscillator; Bandwidth; CMOS technology; Filters; Frequency conversion; Frequency synthesizers; Phase locked loops; Phase noise; Signal resolution; Signal synthesis; Voltage-controlled oscillators;
Conference_Titel :
Frequency Control, 1990., Proceedings of the 44th Annual Symposium on
Conference_Location :
Baltimore, MD
DOI :
10.1109/FREQ.1990.177545
