Abstract
A low phase noise differential Colpitts voltage- controlled oscillator (VCO) with the bottom series PMOS cross-coupled current source is presented. The core Colpitts VCO adopts a pair of PMOS as the biased current source at the bottom, instead of a conventional NMOS topology, to achieve a better phase noise performance as the PMOS has lower flicker and white noise than those of NMOS and the output power spectral density of PMOS operated in bottom-biased type is further less than that in top-biased one in the same power consumption. The fabricated VCO operates from 4.9 to 5.46 GHz with 10.6% tuning range when the power consumption is below 6.4 mW with a supply voltage of 1.8 V. The measured phase noise at 100 kHz offset is -100.3 dBc/Hz at 5.46 GHz and achieves a good FOM performance of -187 dBc/Hz.
| Original language | English |
|---|---|
| Article number | 4967844 |
| Pages (from-to) | 401-403 |
| Number of pages | 3 |
| Journal | IEEE Microwave and Wireless Components Letters |
| Volume | 19 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2009 Jun 1 |
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
- Condensed Matter Physics
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A 5 GHz differential colpitts CMOS VCO using the bottom PMOS cross-coupled current source. / Hou, Jian An; Wang, Yeong-Her.
In: IEEE Microwave and Wireless Components Letters, Vol. 19, No. 6, 4967844, 01.06.2009, p. 401-403.Research output: Contribution to journal › Article
TY - JOUR
T1 - A 5 GHz differential colpitts CMOS VCO using the bottom PMOS cross-coupled current source
AU - Hou, Jian An
AU - Wang, Yeong-Her
PY - 2009/6/1
Y1 - 2009/6/1
N2 - A low phase noise differential Colpitts voltage- controlled oscillator (VCO) with the bottom series PMOS cross-coupled current source is presented. The core Colpitts VCO adopts a pair of PMOS as the biased current source at the bottom, instead of a conventional NMOS topology, to achieve a better phase noise performance as the PMOS has lower flicker and white noise than those of NMOS and the output power spectral density of PMOS operated in bottom-biased type is further less than that in top-biased one in the same power consumption. The fabricated VCO operates from 4.9 to 5.46 GHz with 10.6% tuning range when the power consumption is below 6.4 mW with a supply voltage of 1.8 V. The measured phase noise at 100 kHz offset is -100.3 dBc/Hz at 5.46 GHz and achieves a good FOM performance of -187 dBc/Hz.
AB - A low phase noise differential Colpitts voltage- controlled oscillator (VCO) with the bottom series PMOS cross-coupled current source is presented. The core Colpitts VCO adopts a pair of PMOS as the biased current source at the bottom, instead of a conventional NMOS topology, to achieve a better phase noise performance as the PMOS has lower flicker and white noise than those of NMOS and the output power spectral density of PMOS operated in bottom-biased type is further less than that in top-biased one in the same power consumption. The fabricated VCO operates from 4.9 to 5.46 GHz with 10.6% tuning range when the power consumption is below 6.4 mW with a supply voltage of 1.8 V. The measured phase noise at 100 kHz offset is -100.3 dBc/Hz at 5.46 GHz and achieves a good FOM performance of -187 dBc/Hz.
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U2 - 10.1109/LMWC.2009.2020038
DO - 10.1109/LMWC.2009.2020038
M3 - Article
VL - 19
SP - 401
EP - 403
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
SN - 1531-1309
IS - 6
M1 - 4967844
ER -