Title :
A low-noise, GaAs/AlGaAs, microwave frequency-synthesizer IC
Author :
Diorio, Chris ; Humes, Todd ; Notthoff, Johannes K. ; Chao, Gregory ; Lai, Alex ; Hyde, John D. ; Kintis, Mark ; Oki, Aaron
Author_Institution :
Dept. of Comput. Sci. & Eng., Washington Univ., Seattle, WA, USA
fDate :
9/1/1998 12:00:00 AM
Abstract :
We have developed a GaAs/AlGaAs frequency-synthesizer IC with a 5.5-GHz feedback divider, a 2-GHz reference divider, a 500-MHz phase-frequency detector, 1-ns charge-pump pulses, and a gain-normalized charge-pump output with ±8-mA peak current and an 18-pA/√Hz noise floor. The feedback divider allows continuously selectable divide ratios from 12 to 16383, and supports dual-modulus pulse-swallowing fractional synthesis with single-bit control. The reference divider allows continuously selectable divide ratios from 1 to 4095; an optional divide-by-four/five input prescaler extends the divide ratios to 20475. The chip consumes 1 W from +5 and -5.2 V supplies
Keywords :
III-V semiconductors; MMIC; aluminium compounds; circuit feedback; detector circuits; frequency dividers; frequency synthesizers; gallium arsenide; -8 to 8 mA; 1 W; 2 GHz; 5 V; 5.5 GHz; 500 MHz; GaAs-AlGaAs; III-V semiconductors; charge-pump pulses; continuously selectable divide ratios; dual-modulus pulse-swallowing fractional synthesis; feedback divider; gain-normalized charge-pump output; microwave frequency-synthesizer IC; peak current; phase-frequency detector; prescaler; reference divider; single-bit control; 1f noise; Charge pumps; Frequency conversion; Gallium arsenide; Integrated circuit noise; Microwave integrated circuits; Output feedback; Phase detection; Phase frequency detector; Phase noise;
Journal_Title :
Solid-State Circuits, IEEE Journal of
