Title :
Cascaded quality factor of ring LC oscillators
Author :
Gu, Zheng ; Thiede, Andreas
Author_Institution :
Dept. of Electr. Eng. & Inf. Technol., Paderborn Univ., Germany
Abstract :
This paper analyzes the cascading effect of the quality factors (Qs) under various definitions. Under the appropriate definitions, the effective Q of the filter with cascaded stages, the relationship between the noise rejection of the positive feedback (PFB) oscillator constructed with an identical bandpass gain stages and the cascading effect of Qs have been investigated. Good phase noise performance of around -102 dBc/Hz@ 1 MHz has been measured from a 4-stage 10 GHz PFB ring LC oscillator fabricated in CMOS process, where only low Q passive components are possible to be integrated.
Keywords :
Q-factor; UHF oscillators; cascade networks; feedback oscillators; 1 MHz; 10 GHz; CMOS process; bandpass gain stages; cascading effect; low Q passive components; noise rejection; positive feedback oscillator; quality factor; ring LC oscillators; Band pass filters; Bandwidth; Energy storage; Feedback; Frequency; Q factor; RLC circuits; Resonance; Ring oscillators; Voltage;
Conference_Titel :
Electron Devices for Microwave and Optoelectronic Applications, 2004. EDMO 2004. 12th International Symposium on
Print_ISBN :
0-7803-8574-8
DOI :
10.1109/EDMO.2004.1412397
