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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Choong-Yul Cha Hyoung-Chul Choi Hoon-Tae Kim Sang-Gug Lee |
| Copyright Year | 2005 |
| Description | Author affiliation: Samsung Adv. Inst. of Technol., Gyeonggi-Do, South Korea (Choong-Yul Cha) |
| Abstract | This paper proposes a new method to suppress the 1/f noise contribution of active devices in an oscillator using source damping resistors. The operational mechanism of the proposed method is analyzed through circuit simulation with a complementary LC differential oscillator topology. This shows that the amount of 1/f noise and the mismatch of instantaneous current swing of the oscillator active devices can be substantially reduced with source damping resistors. The reduced 1/f noise and instant current mismatch leads to a phase noise improvement by suppressing 1/f noise up-conversion to phase noise. To prove experimentally the usability of the proposed technique, two complementary LC differential VCOs with different damping conditions are fabricated using 0.18 /spl mu/m CMOS technology. The measurement result shows that there is about 6.0 dBc, 4.0 dBc and 1.0 dBc of phase noise improvement at 10 kHz, 100 kHz and 1 MHz offset frequency with source damping resistors, respectively. |
| Sponsorship | IEEE Microwave Theory and Techniques Soc. IEEE Electron Devices Soc. IEEE Solid State Circuits Soc |
| Starting Page | 399 |
| Ending Page | 402 |
| File Size | 730354 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780389832 |
| ISSN | 15292517 |
| DOI | 10.1109/RFIC.2005.1489824 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-06-12 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Radio frequency Oscillators Damping Resistors Phase noise Circuit noise Active noise reduction Noise reduction CMOS technology Circuit analysis |
| Content Type | Text |
| Resource Type | Article |
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