DocumentCode
3382462
Title
A noise rejective VCO with build-in active LC filter
Author
Zhuo, Ma ; Yang, Guo ; Lunguo, Xie ; Rongrong, Liu ; Hongjian, Zuo
Author_Institution
Comput. Sch., Nat. Univ. of Defense Technol., Changsha, China
fYear
2011
fDate
25-28 Oct. 2011
Firstpage
598
Lastpage
601
Abstract
VCO is the key component in PLLs, and is easy to be interfered by the noise on control voltage or power supply. In this article, a build-in LC filter is inserted into a single-end VCO which is named BF-VCO. The LC filter consists of a regulated cascode active inductor and a capacitor. And the low-pass bandwidth is not greater than 1.6MHz. The measurement spectrum shows that the noise received by the succeeding ring oscillator is attenuated for about 20dB, while the white noise floor changes little.
Keywords
active filters; capacitors; inductors; low-pass filters; voltage-controlled oscillators; BF-VCO; PLL; build-in active LC filter; capacitor; control voltage; low-pass bandwidth; noise rejective VCO; power supply; regulated cascode active inductor; ring oscillator; single-end VCO; white noise floor; Clocks; Noise; Noise measurement; Power measurement; Switches; Transforms; Voltage-controlled oscillators; LC filter; VCO; active inductor; regulated cascode; spectrum;
fLanguage
English
Publisher
ieee
Conference_Titel
ASIC (ASICON), 2011 IEEE 9th International Conference on
Conference_Location
Xiamen
ISSN
2162-7541
Print_ISBN
978-1-61284-192-2
Electronic_ISBN
2162-7541
Type
conf
DOI
10.1109/ASICON.2011.6157276
Filename
6157276
Link To Document