This paper presents a two-stage 3.3V ring VCO in a 0.35μm CMOS technology with differential control and quadrature outputs. The measured common mode noise rejection at 1MHz is 32dB better than for a single-ended control topology. It also has improved supply noise rejection which is 38dB better than conventional differential ring oscillator at 320MHz. The measured phase noise is -117dBc/Hz at a 1MHz offset from the 973MHz center frequency. Since the trend of low-voltage operation degrades oscillator phase noise, our design is particularly well suited for low voltage high performance systems.
|Original language||English (US)|
|Number of pages||5|
|Journal||Proceedings of the Annual IEEE International ASIC Conference and Exhibit|
|State||Published - Jan 1 2001|
|Event||14th Annual IEEE International ASIC/SOC Conference- System-on-Chip in a Networked World- - Arlington, VA, United States|
Duration: Sep 12 2001 → Sep 15 2001