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| Phase Noise - RF Cafe Forums | ||||||
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Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
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Below are all of the forum threads, including all the responses to the original posts. satish.1979 Post subject: Phase Noise Posted: Tue Oct 03, 2006 9:45 am Captain Joined: Tue Oct 03, 2006 3:03 am Posts: 11 Location: India Q1 why flicker noise contributes to the phase noise, not the thermal noise in oscillators? Top Stephen Post subject: Posted: Tue Oct 03, 2006 10:11 am Captain Joined: Wed Jun 21, 2006 8:33 pm Posts: 21 Location: Queen Creek, Arizona Both flicker and thermal noise increase the phase noise. The issue is that flicker noise in MOS devices, can be very large, upto the corner frequency (the frequency at which flicker and thermal noise have equivalent magnitudes). In MOS devices the corner frequency can extend to the low the high KHz or low MHz, while in bipolar it usually stays below the low 100's of Hz. Ergo, because flicker noise tends to have much larger magnitudes, especially at lower frequencies, many designers choose to ignore thermal noise and state that flicker is the only phase noise contributor. This is in fact a mistake; its simply that Flicker noise tends to dominate. But both contribute to phase noise degradation, its just a question of how much. _________________ CMOS RF and Analog ESD Specialist! www.srftechnologies.com Top satish.1979 Post subject: ThanksPosted: Wed Oct 04, 2006 2:05 am Captain Joined: Tue Oct 03, 2006 3:03 am Posts: 11 Location: India Hello Stephen Thanks for your brief explanation. Now I am clear about the phase noise in oscillator. suggest me some books or articles on oscillator design Have a nice day Top IR Post subject: Posted: Tue Oct 10, 2006 6:40 am Site Admin Joined: Mon Jun 27, 2005 2:02 pm Posts: 373 Location: Germany Hello, There are some nice articles in www.rfic.co.uk website: http://www.odyseus.nildram.co.uk/RFMicr ... llator.pdf http://www.odyseus.nildram.co.uk/RFMicr ... Basics.pdf http://www.odyseus.nildram.co.uk/System ... eNoise.pdf Good luck! _________________ Best regards, - IR Top Stephen Post subject: Posted: Wed Oct 11, 2006 1:41 pm Captain Joined: Wed Jun 21, 2006 8:33 pm Posts: 21 Location: Queen Creek, Arizona IR, That is a great website. Thanks for the link; I had never stumbled across the site previous. _________________ CMOS RF and Analog ESD Specialist! www.srftechnologies.com Top fred47 Post subject: Book on Oscillator DesignPosted: Thu Oct 19, 2006 5:51 pm General Joined: Wed Feb 22, 2006 3:51 pm Posts: 104 Hi! One of the most available books on oscillator design is by Randall Rhea, entitled Oscillator Design and Computer Simulation. Good Luck! Fred Posted 11/12/2012 | ||||||
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