A 2.2 GHz CMOS VCO with inductive degeneration noise suppression
P Andreani, H Sjoland - Proceedings of the IEEE 2001 Custom …, 2001 - ieeexplore.ieee.org
Proceedings of the IEEE 2001 Custom Integrated Circuits Conference …, 2001•ieeexplore.ieee.org
A 1.4 V, 9 mA monolithic LC-tank voltage-controlled oscillator (VCO) fabricated in a standard
0.35/spl mu/m CMOS process is presented. The VCO is tunable between 2.0 GHz and 2.37
GHz, and displays a phase noise between-140 dBc/Hz and-138 dBc/Hz at a 3 MHz offset
frequency across the whole tuning range. This low phase noise is achieved through the use
of an on-chip LC filter and an off-chip low frequency inductor, which totally remove the noise
of the tail current source. The phase noise improvement due to the off-chip inductor is …
0.35/spl mu/m CMOS process is presented. The VCO is tunable between 2.0 GHz and 2.37
GHz, and displays a phase noise between-140 dBc/Hz and-138 dBc/Hz at a 3 MHz offset
frequency across the whole tuning range. This low phase noise is achieved through the use
of an on-chip LC filter and an off-chip low frequency inductor, which totally remove the noise
of the tail current source. The phase noise improvement due to the off-chip inductor is …
A 1.4 V, 9 mA monolithic LC-tank voltage-controlled oscillator (VCO) fabricated in a standard 0.35 /spl mu/m CMOS process is presented. The VCO is tunable between 2.0 GHz and 2.37 GHz, and displays a phase noise between -140 dBc/Hz and -138 dBc/Hz at a 3 MHz offset frequency across the whole tuning range. This low phase noise is achieved through the use of an on-chip LC filter and an off-chip low frequency inductor, which totally remove the noise of the tail current source. The phase noise improvement due to the off-chip inductor is between 2 dB and 6 dB, increasing with higher oscillation frequencies.
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