electronics forum

Rules | Recent posts | topic RSS | Search | Register  | Log in

VCO Phase Noise
Post new topic  Reply to topic    EDAboard.com Forum Index -> RF, Microwave, Antennas and Optics -> VCO Phase Noise
Author Message
hrkhari



Joined: 04 Mar 2004
Posts: 225
Helped: 3
Post31 Jan 2006 18:11   

VCO Phase Noise
Hi Guys:

The phase noise of the designed pMOS based LC-VCO, 4-3GHz of tunability, was indicated to be -126dBc/Hz at 1MHz of offset frequency, when I integrated an open drain buffer the phase noise degraded to about -67dBc/Hz. When it is indicated on the phase noise of a VCO in many journals , it is around -112dBc/Hz, does this value correponds to the phase noise of an integrated buffer or standalone phase noise of the VCO?. How do I improve my phase noise performance of the integrated VCO and buffer?.Thanks in advance

Rgds
Back to top
Google
AdSense
Google Adsense
Post31 Jan 2006 18:11   

Ads


Back to top
BigBoss



Joined: 17 Nov 2001
Posts: 1039
Helped: 63
Location: Earth
Post31 Jan 2006 21:48   

VCO Phase Noise
Why don't you use emitter follower to buffer your signal?? Or if you tech. is proper source follower ???
Generally we use either emitter follower or Cherry-Hooper limiting amplifier to buffer the VCO signals and in measurements we obtain -141dBm/Hz @ 4.6MHz..

Think that...
Back to top
Arabic versionBulgarian versionCatalan versionCzech versionDanish versionGerman versionGreek versionEnglish versionSpanish versionFinnish versionFrench versionHindi versionCroatian versionIndonesian versionItalian versionHebrew versionJapanese versionKorean versionLithuanian versionLatvian versionDutch versionNorwegian versionPolish versionPortuguese versionRomanian versionRussian versionSlovak versionSlovenian versionSerbian versionSwedish versionTagalog versionUkrainian versionVietnamese versionChinese version
Post new topic  Reply to topic    EDAboard.com Forum Index -> RF, Microwave, Antennas and Optics -> VCO Phase Noise
Page 1 of 1 All times are GMT + 1 Hour
Similar topics:
65 nm Process and VCO - VCO suffer from high phase noise (9)
VCO noise - phase noise increases when s-parameter is used (2)
phase noise in LC VCO (3)
VCO phase noise (14)
VCO phase noise (4)
vco phase noise (1)
Phase noise of LC VCO (12)
testing phase noise of VCO (2)
[phase noise] questions of LC VCO (2)
VCO phase noise simulation (5)


Abuse || Administrator || Moderators || Support us || sitemap
topic RSS